I just had a magnaflow direct fit, catalytic converter installed and the problem was fixed. I did the "dance" and only saw "P 1684" "-----" and "donE". The check engine light, one of the most obvious indicators of a malfunction in your car, is also one of the indications of a bad catalytic converter.When checked by a compatible device, it gives a catalyst fault code which must be decoded with the help of the operating manual. A code reader is a handy tool if you have a check engine light. The catalytic converter works by breaking down unburned gases left over by the combustion process. We get it turned off periodically, and then it goes right back on. Low and behold, the light comes back on after about 2 days. A Catalytic Converter controls emissions in your car’s exhaust system. If all is good, the light should go off after driving a few miles. It runs great, except that there seems to be a problem with the catalytic converter, causing the orange "check engine" light to remain perpetually on. Generally, a flashing CEL indicates that the engine is misfiring, which can damage your engine or catalytic converter. A flashing check engine light means that you need to pull over immediately as your vehicle has a serious issue that could cause severe engine damage. The first thing you should do is to pull over and check whether anything is wrong with your engine components. I have a 2001 grand prix GT that was having acceleration issue and I determined that it was a catalytic converter issue. I just couldn't afford the $1,200. "Check Engine Light" Codes P0420 and P0430 Replacing a catalytic converter or "cat" has become a big, expensive drain on a lot of people's budgets these days. My check engine light came on and I took it to the Subaru dealer. After driving for a while, the check engine light should go off. FWIW, on July 31st, we were on a car ferry heading home. I checked the gas cap and waited a few "driving cycles" before calling the dealer. We recommend you try tightening it first and then see if the light goes off. Past codes came up as the catalytic converter and gas cap. The check engine light is for mostly minor issues. Other Ways of Diagnosing Catalytic Converter Failure One of the first things an experienced mechanic will do to trace a clogged converter is they will temporarily remove the oxygen sensor or unbolt the exhaust downpipe. The next day the service engine soon light came on. Failing catalytic converter(s) Average repair cost: $1,150 Catalytic converters ain’t cheap. It stayed on for a while, went off, came back on, went off, came back on. They did a check and said that I need to replace the catalytic converter. Even after tightening, it will take some time for the light to go off. If you delay misfire repairs, you can cause additional problems like a flooded engine or catalytic converter failure. The ferry guys quickly jumped it. Two questions: 1. I ended up getting one of the off brand catalytic converters for about $600 less. All that code says is either Converter operating below efficency or Converter operating below threshold. However, there has to be a code generated that causes the light to go on so I am dubious that you took it … It converts carbon monoxide and other harmful gases into less harmful byproducts. Continue driving and see if the check engine light turns off. I don't know why or how it works; but it worked. To make things worse, I wouldn’t pass emissions inspection with the check engine light on. If I replace it with a universal Magnaflow catalytic converter (approximately $100) will the check engine light come back on? I have a 2004 Infiniti G35 and the bank 2 catalytic converter has triggered the check engine light. Observe the engine temperature of your vehicle. Below we have highlighted the most common causes of a check engine light. Finally, don’t ignore the check-engine light. Failed Catalytic Converter. I want to share some information about what's happening here with emissions testing, and some ways to get emissions-compliant without shelling out piles of money. In most cases, your Toyota Corolla light will go off after about 20-40 miles. The service engine soon light never came on. When it was time to drive off, the van wouldn't start. Toyota was kind enough to do a "good will" no charge warranty replacement. According to the mechanic who diagnosed it, the existing cat is CA compliant. The check engine light only comes on in certain conditions: If the check engine light is coming on intermittently, be sure to notice any changes in the performance of your vehicle when the light is on.If you do notice a difference, try driving your vehicle as little as possible until you can bring it in for service. They changed the catalytic converter and ordered me a new gas cap. check engine light - catalytic converter Problem Reports If you have a problem with your Eclipse you need assistance with, this is the forum to post your question and get answers. Welcome to the Club4G Forums where you can join fellow owners from all over North America discussing anything related to the 2006+ Mitsubishi Eclipse. Poor engine performance. That will be a $1600 bill. Also, make sure you don’t have codes P0174, P0171, P0172, or P0175 which can mean the engine is running rich or lean, which can burn out your catalytic converter. if it doesn’t, it may be time to ask your mechanic to check it out. If the catalytic converter is replaced without repairing the misfire, the new catalytic converter will go bad again. Recently at 269,000 miles the P0420 code came on again. My check engine light came on about a week ago. In most cases you will receive a P0420 or P0421 code. ... the light should go off by itself after a short time. The orange check engine light is a car's way of ... a bad O2 sensor can damage components like the spark plugs and the catalytic converter. – Gabriel Diego Jun 15 '16 at 18:42 @Gabriel Diego Not every P0420 is a perfectly accurate, irrefutable analysis of catalytic converter … So, if your converter is marginal, and you did a lot of stop-and-go driving, which creates high demand for the converter, that may have turned on the check engine light. Once again within the past 6 mos or so, the check engine light came back on again and catalytic converter needed replacement again. The temperature of the engine will go up or down as the vehicle moves. We have a 2003 Corolla, which we bought used a couple of years ago. The question of whether the check engine light will reset itself is often asked by many drivers. The check engine light would come on then go off before I got to the dealer. Alternately, you can purchase a gas cap for a few dollars online or at an auto parts store. The common catalyst failure code is P0420 or P0430, but check your code reader's manual to be sure, and remember that there may be a cluster of other trouble codes that will go along with the one for the catalytic converter. Had to replace the catalytic converter when the check engine light came on for the first time back in 11/04 when the vehicle had 139k miles. Gas cap issues can reduce fuel pressure and allow fuel vapors to escape, reducing fuel economy and increasing harmful emissions. Took my car to an exhaust place, they said it was my O2 sensor or my catalytic converter. A catalytic converter is a device used to reduce the emissions from an internal combustion engine. The reduced engine efficiency of a vehicle with catalytic converter problems causes energy that would have been used to power the vehicle to instead turn into heat. So after about a week, I take it back. One week later check engine light came on and stayed on. A lot of other problems will hit your wallet much harder. My check engine light came on and was solid, not blinking, my mechanic reset my sensors, but it didn't help. Usually, an illuminated check engine light is the first and only sign of a bad catalytic converter. If the gas cap is loose, tighten it and continue driving. The car runs fine, so signs so far of misfire or bad fuel consumption. A misfire will turn on your check engine light for sure, and severe misfires will set your Check Engine light blinking. Loose Gas Cap: Your gas cap is loose, broken, or simply missing. 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