Replaced Catalytic Converter Check Engine Light Still On

As long as the converter does its job efficiently, the vehicle will meet emissions and pass both a tailpipe emissions check and/or an OBDII plug-in emissions test. That would be true if the converter had been replaced. Checked it and they said the catalytic converter needed. But the store manager no less, he said it could either be oxygen sensors or mass air flow sensor. My questions are: My truck is still running fine and I haven't noticed a drop in MPG so how long can I go before replacing it? How will I know when to. Head to an auto parts store and have them run a diagnostic to find the cause of the check. Now, they want to replace the cat again and no additional cost. Honda Odysseys are an excellent alternative to bulky mini-vans. Some can be quite expensive. Bought it used with 40,000. After the second one, I had 3 of the 4 O2 sensors replaced and then shortly after, the 4th one went bad. Replacing a catalytic converter in your car can be expensive, but this hack can. The check engine light came back on again. An illuminated check engine light or malfunction indicator lamp (CEL or MIL) with a catalytic converter diagnostic trouble code (DTC) is the most common catalytic converter problem indicator. catalytic converter My check engine light continually came on and I just had both O2 sensors changed. Check your exhaust backpressure upstream of the catalytic converter. You will get a check your engine light on w/o the cats. Reset the computer but the light has come back on. Well, it is NOW sunday and the light is STILL illuminated. Transfer the oxygen sensor from the old converter to the new converter. 1995 Audi A6 - Check Engine Light On - Dealership Replaced Catalytic Converters. Whether it’s something as minor as a loose gas cap or something more serious like a failed catalytic converter, it should be checked out and fixed. My question is would this cause intermeted sluggish acceleration? Could a head gasket cause the catalyst problems? Sometimes after the jeep warms up it has a sluggish acceleration. You can generate more horsepower without it. Most cases it is a simple sensor or sending unit, easily and quickly replaced. I am trying to make sure I have all the parts needed to replace it. So after a while, I took it to a Subaru/Honda/Volvo dealership and had them see what they came up with. Replacing the stock exhaust with an aftermarket system is relatively easy on your Lexus. Let's look at the urgency levels in more detail… Flashing Check Engine Light. The rattle is the result of the mesh inside the converter deteriorating, and it is more noticeable when the engine is first turned over. Found by check engine light and code. Will I Get a "Check Engine" Light If I Install This Exhaust Part? Some aftermarket exhaust parts replace factory catalytic converters. Upon checking from a compatible device, it will give catalyst failure code in the result which will have to decoded using reader's manual. Replaced rear catalytic converter light still comes on told needed to replace the front catalytic onverter. I can not find any answers to this mystery, please help. Is it the O2 sensors needs to be replaced, what do advice me to do Thanks in advance Regards Mohd: October 12, 2016. Then, locate the catalytic converter at the center of your exhaust system and remove the oxygen sensor with a ratchet wrench. Model 2006 (LX) Chrysler 300, Dodge Magnum and Charger NOTE: This recall applies only to the above vehicles equipped with either a 2. Check out These Bad Catalytic Converter Symptoms; Problems Of Removing Catalytic Converter. Head to an auto parts store and have them run a diagnostic to find the cause of the check. If your vehicle's catalytic converter is failing or has gone bad, the "Check Engine Light" will illuminate on the dashboard. o2 sensors & catalytic converter diagnostics Converters typically fail one of two ways: they get too hot, melt and plug up, or the catalyst becomes contaminated and useless. I had my tires replaced and had them run a diagnostic on the check engine light. In most cases, the chip is telling you what it is seeing and the code may or may not point to the catalytic converter. I drive a 2002 Chevy Impala and the check engine light has been coming on for about 4 years. The mechanics have tons of experience dealing with this sort of thing. You only mentioned getting one replaced, perhaps it's a different one. On some vehicles that are equipped with a 2. The computer showed the voltages of front and back oxygen sensors (the catalytic converter is bettween these O2 sensors). You step on the gas and all you feel is a jerky, inconsistent response. That P0420 code is basically the rear O2 sensor telling the PCM that catalytic converter efficiency is below a certain threshold. When your engine is burning oil or running too rich, your catalytic converter's inner fiber may be "burned through. If the catalytic converter fails, the PCM turns on the "Check Engine" light to let you know. The check engine stopped showing for a few days after but then popped back up. Reset the computer but the light has come back on. * They installed the wrong converter. I have a 1995 Audi A6 2. There are several warning signs that your catalytic converter has failed or is failing. 2001 Nissan Pathfinder Check Engine Light "ON"? How much can I expect to receive for my Peugeot 20 I need a mechanics help-engine misfire? How do i get my 89 v6 toyota to pass emissions? How can I get my Honda CRV to start in the cold? How do i know if my catalytic converters are stopp How do I change the Transmission Fluid on a 96 2. Alright well on the bright side - we were able to replace Bank 2 Catayltic Converterr but still having issues with the car sputtering. When the Check Engine or Service Engine Soon light starts flashing, this means that a catalytic converter damaging condition is occurring. Toyota Camry 2002-2006: Why is My Check Engine Light On? If your Check Engine Light (CEL) is on, this article will help you determine why and how to repair. I found an alternate solution that worked twice for me already, and it worked for a few friends who listened to me. It has been in for repair 10+ times and check engine light. Protecting the catalytic converter is largely the job of the oxygen sensors and the check engine light. Last week, the engine light came on for the third or fourth time, after I still had been getting a rough idle in mornings when starting my car (this was after getting the coils/plugs replaced and the catalytic converter) and instead of driving. Also had a Lancer 2. If I don't replace a 'failing' catalytic converter right away, will it harm the engine? If I don't have the converter replaced right away, will it harm my engine? The "Service Engine Soon. Took it to a Ford dealer and they replaced the intake manifold gasket. Fact is, when oxygen sensors were first being used, they did tend to fail. P0420 After Cat Replaced. The car runs fine, so signs so far of misfire or bad fuel consumption. Tried the Lancer on 95 and the light would still stay on, only 98 seemed to help with the Lancer. It’s also important that. The repairman claims it happens sometimes, that the replacement part fails. They checked the check engine light code and said I need a new catalytic converter. The car was running fine, but after two weeks of staring at the light, I took it to a mechanic. After a while, replace sub oxygen sensor (DTC code: P0421) located after catalytic converter and before exhaust tail pipe. I have a 1995 Audi A6 2. A Loose or Damaged Gas Cap. I also am able to pass the emissions test. Can that make a service engine light come on?" It can for any of the following reasons. My husband just paid $1900 to have the catalytic converter replaced in our 2005 Honda CRV with 202k miles. Replaced catalytic converter, O2 sensor went out, Replaced it and check engine light is still on. In addition, the vehicle would intermittently stall without warning. A few of my friends already had this experience, and I wish they came to me first. I found an alternate solution that worked twice for me already, and it worked for a few friends who listened to me. I have a 2001 wrangler and the check engine light came on. You could replace the O2 sensor yourself it's a pretty simple job but you need to know if its your front or rear o2 sensor. Broken: Honda CRV warning light Beth M. If you continue to ignore this light, it will ultimately lead to failure of the catalytic converter. Car runs like new now. I have a 2001 wrangler and the check engine light came on. I found an alternate solution that worked twice for me already, and it worked for a few friends who listened to me. Keep in mind that the catalytic converter could fail again in a short time if an underlying issue is not fixed. In addition, the vehicle would intermittently stall without warning. Catalytic converter clogged and problem code P0420. The mechanic replaced the pipe with an after market part. Mostly it was the sensors, but I did have to have the catalytic converter replaced (they have a longer federal warranty) and an exhaust manifold replaced. When you receive a P0420 code it means your catalytic converter is not operating at maximum efficiency. How to fix Code P0420 What is code P0420 Catalyst System Efficiency Below Threshold. About 3 months after that I had my check engine light on, P0430 (low effeciency cat, passenger side, near manifold). Then, locate the catalytic converter at the center of your exhaust system and remove the oxygen sensor with a ratchet wrench. Get Your Jeep Liberty Catalytic Converter from AutoZone. A few months ago, my check engine light came on. At Collins Muffler & Hitch, we'll run check engine light diagnostics on your vehicle to test a series of exhaust system components, including the catalytic converter pipe, catalytic converter gasket, oxygen sensors, and more-all completely free of charge. It could also be a warning of a serious problem that could damage your engine components. Driving into work this morning the check engine light came on. The blinking light means that the malfunction is significant enough to cause damage to the catalytic converter. Soon the light went out which made me happy, but when the tank got down 3/4, the light came back on again so I have aborted using the BG 44k (at $25 a can it is pretty costly). But guess I'm going to need a catalytic converter down the road soon, to prevent downstream exhaust system clogging and serious engine damage from backpressure. The exhaust was leaking so, I had the front flex pipe before the catalytic converter replaced which was before the down stream O2 sensor. Failing the annual or semi-annual emissions test might also be linked to a failed catalytic converter. Hi Guys, 2 different shops did reads on my check engine light codes, I even paid $100 for one of them to do a full test of all sensors to identify which one was bad. The service engine soon light never came on. WHAT IT MEANS WHEN YOUR GET A CODE READ OF PO420 OR PO430. I think what happens is that more exhaust than desired gets diverted back to the engine, and the PCM observes a larger-than-expected decrease in engine speed. We have a 2000 Honda Odyssey that currently (Sept. Bought it used with 40,000. 00 for replacement. a converter long before the Check Engine light comes on. About 3 months after that I had my check engine light on, P0430 (low effeciency cat, passenger side, near manifold). You like your car, so you take it to be looked at. I have a 2002 buick century and have replaced catalytic converter and both oxygen sensor and the check engine light is still on getting dtc codes p0420 and p1134. Two years ago the Check Engine light came on, we had it turned off but it came back on again. I have a 2001 grand prix GT that was having acceleration issue and I determined that it was a catalytic converter issue. These include the air fuel ratio sensor and the oxygen sensor. This article applies to the Lexus ES (2007-2014). The engine light was on last week. How old is your transmission? It is a 2003 Forester. So You Changed Your Oxygen Sensor And The Light Is Still On??? Maybe This Is The Problem !!! Check Engine Light & the Catalytic Converter - Duration: So You Changed Your Oxygen Sensor And. this problem may or may not have set a code -- it didn't with me. After a while, replace sub oxygen sensor (DTC code: P0421) located after catalytic converter and before exhaust tail pipe. This is a 2002 Toyotal Camry XLE V6 with 117750 miles. Soon the light went out which made me happy, but when the tank got down 3/4, the light came back on again so I have aborted using the BG 44k (at $25 a can it is pretty costly). Replacing a catalytic converter in your car can be expensive, but this hack can. It treats many of the harmful emissions produced by the engine, converting them into water and harmless gases. Find out how to swap one of these out of your exhaust system when it becomes a problem. Back in 2007 when I first noticed the problem I had the catalytic converter replaced. We are verifying fitment of our new product for a final time and still need to take it for a test drive. Below are the top 5 symptoms of a bad catalytic converter. When your engine is burning oil or running too rich, your catalytic converter's inner fiber may be "burned through. Whether it's something as minor as a loose gas cap or something more serious like a failed catalytic converter, it should be checked out and fixed. Mine was doing the rattling and then I started getting decreased performance. Reader Question: Austin, I failed the emission test for the yearly inspection in NC and had the catalytic converter changed and then went to a station to have the check engine light programmed so that it was turned off. How much will a Catalytic Converter Cost to get Repaired or Replaced?. I can not find any answers to this mystery, please help. in short at the end mechanic suggests me to change the catalytic converter because 2, 3 time i replace the sensor but not works , so he said there is the p Podcast Articles Suzuki every catalytic converter sensor 2 problem. If you delay misfire repairs, you can cause additional problems like a flooded engine or catalytic converter failure. Cat was also replaced. The check engine light came back on again. I replaced both times and the light still stays on. This is a 2002 Toyotal Camry XLE V6 with 117750 miles. Anyone else had this happen to them?. It’s measured by comparing the data fed by both the pre-cat and post-cat oxygen sensors. I cleared the code and after a day of driving, the check engine light hasn?t returned. If this structure is destroyed there is no point on trying to weld this back together. On some vehicles that are equipped with a 2. Now it's back on. First check if you have ca emmisions Under the hood is a sticker stating if its ca emmissions If so non ca cat can still throw codes I have same code have had it for 1-2 yrs Tomorrow having dealer run diagnostics to determine problem While most likely the cat its a generic code that can have lots of causes Guessing its the cat is a costly guess. Sometimes the substrate will become loose. If you have been driving around a few months with the check engine light on then depending on your issue you risk killing the cats. Then cleared the light until now. Broken: Honda CRV warning light Beth M. The car was running fine, but after two weeks of staring at the light, I took it to a mechanic. An early warning system. The trouble code is "P0420". If the converter rattles when tapped with a plastic hammer it must be replaced. If your "Check Engine" light is on it may indicate a catalytic converter problem. However, stop at the point of replacing the catalytic converter. 4L engine (RPO LAF), a malfunction-indicator light (MIL) may illuminate due to thermal damage or face erosion of the catalytic converter. Purchased after market parts and did work myself saving $600 over dealer cost. Protecting the catalytic converter is largely the job of the oxygen sensors and the check engine light. Mostly it was the sensors, but I did have to have the catalytic converter replaced (they have a longer federal warranty) and an exhaust manifold replaced. If the technician finds that damage has occurred to your catalytic converter, only then should you replace it. When catalytic converters fail, we have to replace them. Soon the light went out which made me happy, but when the tank got down 3/4, the light came back on again so I have aborted using the BG 44k (at $25 a can it is pretty costly). in short at the end mechanic suggests me to change the catalytic converter because 2, 3 time i replace the sensor but not works , so he said there is the p Podcast Articles Suzuki every catalytic converter sensor 2 problem. If the cat is partially clogged, the EGR system fails its tests in these cars. At the dealership they verified the issue. Still getting 420 and 430 codes. Upon checking from a compatible device, it will give catalyst failure code in the result which will have to decoded using reader’s manual. So, I ordered a Magnaflow Catalytic Converter it arrived today and it looks like I still might need gaskets and bolts because they didn't come with the converter. Could this be the catalyst converter or the engine?. About a month ago I replaced my catalytic converter, a few weeks later the O2 sensor went out. How can my catalytic converter be bad in a year?. Last week, the engine light came on for the third or fourth time, after I still had been getting a rough idle in mornings when starting my car (this was after getting the coils/plugs replaced and the catalytic converter) and instead of driving. The right is completely stopped up and the left is almost stopped up. Well, it is NOW sunday and the light is STILL illuminated. A few days later, the check engine light came on again. This is a serious repair that can cause permanent damage to cars. Honda Accord: How to Replace Your Catalytic Converters. Reset the computer but the light has come back on. Used 2017 GMC Terrain from Maguire Nissan of Syracuse in Syracuse, NY, 13204. Fast, free online quotes for your car repair. What should I do? Does the catalytic converter really need to be replaced? or is it just a faulty sensor?. The rear catalytic converter started acting up (check engine light popped on about every 400-500 miles, it was a PO420) at 110,000 miles. In most cases, the chip is telling you what it is seeing and the code may or may not point to the catalytic converter. Signs that you may need a new catalytic converter include: Your car throws a check engine light; Your engine misfires. I found an alternate solution that worked twice for me already, and it worked for a few friends who listened to me. Reader Question Hi Austin, I know that you are very busy, and I appreciate your time into reading my e-mail. And if an engine issue caused the converter to malfunction, that issue can be addressed too. Hi Guys, 2 different shops did reads on my check engine light codes, I even paid $100 for one of them to do a full test of all sensors to identify which one was bad. I have a 2002 buick century and have replaced catalytic converter and both oxygen sensor and the check engine light is still on getting dtc codes p0420 and p1134. A steady light means there’s no immediate cause for alarm, but you should still get it checked out. Replaced the catalytic converter a year ago. A bad or failing catalytic converter can also cause an illuminated Check Engine Light. Vehicles equipped with OBD-II diagnostic systems are designed to alert the driver to a misfire condition by means of illuminating the "check engine" light on the dashboard, or flashing it if the current misfire conditions are severe enough to potentially damage the catalytic converter. The shop I took it too told me that the drivers side bank was still good and that he personally wouldn't change it. The repairman claims it happens sometimes, that the replacement part fails. SES Light Coming On. Aftermarket converters are available and are much less expensive (usually half the price of an OEM), but understand that some of the aftermarket converters are known to prompt re-curring Check Engine lights, even if they are functioning well. So we replaced the convertor friday, and as I was leaving the shop he told me that the light should go off on it's own and stay off. At the dealership they verified the issue. Collins Muffler catalytic converter, brake & trailer hitch installations serving Irvine, Tustin, Lake Forest, Aliso Viejo Laguna Hills/Niguel. Destroying a Catalytic Converter. My husband just paid $1900 to have the catalytic converter replaced in our 2005 Honda CRV with 202k miles. Toyota Camry 2002-2006: Why is My Check Engine Light On? If your Check Engine Light (CEL) is on, this article will help you determine why and how to repair. As long as the converter does its job efficiently, the vehicle will meet emissions and pass both a tailpipe emissions check and/or an OBDII plug-in emissions test. Your misfire has been occurring all along and it’s finally reached a point where the catalytic converter is being damaged. Check Engine Light Comes On. For those interested in replacing their failed catalytic converters, brand new catalytic converter cost between $400 - $1,600, depending on the type on your exhaust system. It would not hurt to call and ask. Check engine light comes on. Is the catalytic converter causing the check engine light to turn on? The catalytic converter is one of the biggest repairs that may cause the check engine light to turn on. Take it to the dealer. You may not notice if you have catalytic converter problems but the environment will. One of the more common reasons that a check engine light will appear is if there is a problem with the catalytic converter. This article applies to the Lexus ES (2007-2014). Two mechanics said catalytic converter needed to be replaced. As expected, I am getting P0421/P0431 trouble codes. I tried replacing both O2 sensors, but that didn't fix it. Over the years, I have had the dealer replace oxygen sensors where the check engine light came on while waiting at an ATM or immediately after turning off the cruse control. I can not find any answers to this mystery, please help. I do a full drive cycle and the check engine light and codes go away. Upon checking from a compatible device, it will give catalyst failure code in the result which will have to decoded using reader’s manual. He also cleared the check engine code, so the light is no longer on. If this is the case, the components of your catalytic converter may melt. As a result, the emitted gasses make a less damaging impact on the environment. In this article, we will teach you how to replace and install catalytic converters easily. One of the more common reasons that a check engine light will appear is if there is a problem with the catalytic converter. Question: What will happen if I don't replace the catalytic converter?. Replaced the catalytic converter a year ago. At that point, you’re already in a danger zone. this problem may or may not have set a code -- it didn't with me. If Check Engine light turns on. That P0420 code is basically the rear O2 sensor telling the PCM that catalytic converter efficiency is below a certain threshold. Toyota was kind enough to do a "good will" no charge warranty replacement. reading the flashes of the Check Engine Light. Some of these early systems are not fully OBD II compliant, meaning they may not set codes or turn on the Check Engine light for misfires, catalytic converter problems or fuel vapor leaks. Chevy/Chevrolet Check Engine Light Questions This page will list all the Check Engine Light questions and answers asked of us pertaining to Chevy vehicles. You step on the gas and all you feel is a jerky, inconsistent response. 8T jetta, with only 60k miles on it and have gotten all of the above parts replaced. HI! I have a question. One of the more common reasons that a check engine light will appear is if there is a problem with the catalytic converter. It could also be a warning of a serious problem that could damage your engine components. Well after 2 failed smog checks and driving at least 700 miles, the check engine is still not "ready". If you have been driving around a few months with the check engine light on then depending on your issue you risk killing the cats. Before I would replace the Catalytic converter, i'd see if an exhaust shop like Midas would check it to see if it's bad. 4L engine, may have a condition where the malfunction indicator lamp illuminates, and/or there is a lack of engine power. "I just had my catalytic converter replaced. Obviously, you won’t know. Been along time, quite busy. I bought an 06 Xterra last year with 115K. Higher mileage M2's ('99 and newer) may experience a check engine light due to 'excessive EGR flow'. I have a 2012 Chevy Equinox. First let me say there is no way to test cat efficiency. If this structure is destroyed there is no point on trying to weld this back together. The catalytic converter, because it cleans up any exhaust pollutants that exit the engine. I had the car inspected & the mechanic said it required a new “cross over pipe,” but otherwise was in good condition. If there are, you should replace it with one that seals the tank properly. It’s important to know about the bad catalytic converter symptoms so that you can spot them immediately and take the vehicle to a servicing shop for maintenance. If the light comes back on, I go to the dealership. Soon the light went out which made me happy, but when the tank got down 3/4, the light came back on again so I have aborted using the BG 44k (at $25 a can it is pretty costly). The mechanics have tons of experience dealing with this sort of thing. Which is a Secondary air system malfunction. It's been ten days since I replace my old catalytic converter for this one. I put my 2004 Subaru Forester up on ramps to get more space to work with. HI! I have a question. I have gotten the fuel rail senor, and catalytic converter replaced at the dealership. I also am able to pass the emissions test. I replaced the MAF. If the check engine light is on, but steady rather than flashing, this means there is an issue, but it's not yet serious. My check engine light still comes on randomly as well as the message that says "reduced engine speed" which does not let me drive over 20 MPH, and creates some serious shaking. If the converter rattles when tapped with a plastic hammer it must be replaced. I take it Monday to the same shop and now they tell me it's my C. Head to an auto parts store and have them run a diagnostic to find the cause of the check. This can be caused by a fuel system problem, a clogged catalytic converter, damaged O2 sensors or a combination of all three. Now, if the check engine light ever comes on, I disconnect the battery to clear the codes. If the check engine light is blinking, you should pull to the side of the road safely and shut the engine off. A Loose or Damaged Gas Cap. Subaru Check Engine Light and Code # P0420 Explained By Justin Stobb on January 18, 2011 in All Wheel Drive Auto News , Featured , Subaru Repair Seattle If the check engine light comes on in your Subaru there is always a corresponding code set in the computers memory. We get calls almost everyday from customers wanting to know how much a "high flow" or "performance" catalytic converter will cost for their car. For example, the oxygen sensor should not be replaced if diagnostic trouble codes P0420 or P0430 for catalyst efficiency are present alone. As I said earlier, excess oxygen and fuel cause a catalytic converter to overheat and fail. My check engine light came on and I took it to the Subaru dealer. engine check light, fuel consumption very bad. So replace both sensors and the cat and clear the codes. Regenerated Catalytic Converters - This is the best of everything. If it is not within spec replace the sensor. * They installed the wrong converter. So You Changed Your Oxygen Sensor And The Light Is Still On??? Maybe This Is The Problem !!! Check Engine Light & the Catalytic Converter - Duration: So You Changed Your Oxygen Sensor And. Thankfully, most modern cars have a check engine light that will turn on if any of the sensors discover a problem. 00 !! Midas said $1,800. Check Engine Light Sign in to follow it's time to replace the catalytic converter. While this is often the culprit, things like plug wires, spark plugs , fuel adjustment—and lots more—can be a much less expensive solution. It makes sense: people could just pull out the bulb for the check engine light. When attach a trouble code reader and come up with a P0420, your first assumption may be that you need a new catalytic converter, simply because the words catalytic converter are mentioned in the code. This, however, does not mean you can afford to ignore the check engine light. An engine diagnostic is still called for to avoid expensive engine repair costs. Replacing a catalytic converter is a costly proposition, and diagnosing a problem with it is best left to a professional. He said that based on the code (I don't know what the code was - he didn't put it on my receipt) I needed to replace the catalytic converter ($1200+), but that might not actually be the problem, so if it isn't I would then need to replace the computer (another $1200+). Soon the light went out which made me happy, but when the tank got down 3/4, the light came back on again so I have aborted using the BG 44k (at $25 a can it is pretty costly). A few of my friends already had this experience, and I wish they came to me first. So we replaced the convertor friday, and as I was leaving the shop he told me that the light should go off on it's own and stay off. How to fix Code P0420 What is code P0420 Catalyst System Efficiency Below Threshold. Well maintained. Usually you will be able to feel a noticeable difference in the performance of your vehicle. 1) Warning Light – On your dashboard, the “Check Engine” warning light could illuminate if an engine problem has caused your catalytic converter to malfunction. My old 05 LR3 did this a lot. Flashing Check Engine Light. Before you panic, check out the 10 most common issues that cause the check engine light to turn on. My check engine light is coming on with a P040 code. In most cases, the chip is telling you what it is seeing and the code may or may not point to the catalytic converter. Replaced rear catalytic converter light still comes on told needed to replace the front catalytic onverter. A catalytic converter is an exhaust emission control device that reduces toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction (an oxidation and a reduction reaction). Car runs like new now. So we replaced the convertor friday, and as I was leaving the shop he told me that the light should go off on it's own and stay off. 4L engine (RPO LAF), a malfunction-indicator light (MIL) may illuminate due to thermal damage or face erosion of the catalytic converter. I suspect that I paid a premium price, $1100, for a part that was not OEM quality. Will I be able to reuse those parts from the old one? Truck is a 2003 GMC Sonoma 4. In this section, allow me to walk you through some of the problems that can be apparent when you see a flashing Check Engine Light from the dashboard. If the light comes back on, I go to the dealership. Replaced catalytic converter and light came back after erasing code. If Check Engine light turns on. About two days later, the check engine light came back on. I drive a 2002 Chevy Impala and the check engine light has been coming on for about 4 years. After the customer replaced the converter, the light did not come back. If your catalytic converter is failing, it’s going to wreak havoc on your vehicle’s exhaust system. After about a week, the check engine light is coming on again showing bank one oxygen sensor problem. My catalytic converters couldn't be bad already could they? I have an AFE ProDry drop in filter, so I don't think my mass air flow sensor is dirty (I already cleaned it off just in case). So after a while, I took it to a Subaru/Honda/Volvo dealership and had them see what they came up with. Well maintained. I did tons of searching and found only 2 posts in 25 pages of threads that pointed to clogged catalytic. Your vehicle fails an emissions test. A few months ago, my check engine light went on. It's been ten days since I replace my old catalytic converter for this one. Replaced 02 sensors, engine light still on. The casing of the converter shrinks at a much faster rate than the substrate compressing it. But, it causes so many other problems that you will be wondering whether it is a good idea to go through all those troubles just for a bit of extra horsepower. I told the dealership not to replace the cat converter yet. There are many companies on the web today selling what they call a "high flow" or "performance" catalytic converter. Well, it is NOW sunday and the light is STILL illuminated. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: