The sensors will trigger an Onboard Diagnostics (OBD) trouble code that’s stored in your car’s computer. Do I guess which one it is? Hey Glenn, I have a 2007 Suzuki Grand Vitara and i'm of course getting the imfamous P0420 code. If only one of the converters has failed, you can sometimes connect both rear sensor signal wires together and the average of the two makes both look good in the eyes of the PCM (Powertrain Control Module). I’ll tell you how I kept my old car running as good as new with little cost for upkeep. The check engine light is on not flashing, i went to O'Reilly today to see what codes there were, i should have gotten a print out, but more or less it stated an issue with the converters. The problem most likely is a bad oxygen sensor. Question: I have a 2006 Subaru Outback. Knowing if we should continue driving or stop right now is difficult. I have a Jeep Wrangler 2008. I have a 2005 Nissan Altima. However, there are still other less-costly causes for a trouble code P0420. We’re in GA. Glenn Stok (author) from Long Island, NY on December 30, 2019: Michele Solomon - Since you got gas from a different station, it's possible that it had water in the gas. Glenn Stok (author) from Long Island, NY on March 22, 2019: Diosa1202 - Did you try my method first? Once you rule out the catalytic converter with your own scanner, go find an honest repair shop to figure out why you can’t go over 10 mph. If the light eventually comes back on, then you have a more serious problem, and you might need that expensive replacement. I received the code stating to change catalytic converter. Since they are Toyota's proprietary info I am not sure what that means? I'm sure it doesn’t help in all cases, but it worked for me and several of my friends who had the same issue. Spark plug/ignition coil issues. Paying under $40 for your own scanner is a lot cheaper than $1000 for a replacement you may not need. I followed your suggestion and ran a full tank of high octane gas in my car. Likewise, if your catalytic converter is going reasonable, and you did countless of stop-and-go driving, that may have turned on the check engine light due to the high usage of the converter. I have a 2002 4runner. If a light is on, you either need to take your car to a professional or use your own OBD-II tool to diagnose the code to see if it is a catalytic converter problem. Fingers crossed that I’m in the clear because inspection is next month and a new cat converter will cost me $1100. I had an O2 sensor reading and my mechanic changed the sensor 2x but it keeps getting the check engine light come back. I would not trust those words. But that doesn’t necessarily mean you have a bad catalytic converter. 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 … My van has 190,000 miles on it, and it runs rough sometimes when first started, but it usually smooths out later. When i disconnecting the battery the engine light comes off. A dual OBD-1/OBD-2 tool that includes everything you need, including the extension cord for the older models that have the port under the hood, can be found here: https://amzn.to/2M3muA5. My check engine light goes on then off right away. Never trust buying a car when the check engine light is on. The light has not come on again. Glenn Stok (author) from Long Island, NY on March 20, 2019: Stephanie Gordon - Since it stayed off until you filled up again, assuming you went back to the usual lower octane gas, maybe you just need to run it longer with high octane. Question: Is there a diagnostic tool for this year for my Chevy S10 V6 4.3L is a 1991 model? Then "drive it like I stole it" for a while. Did I, a 63 year old female got ripped off! So why would this be illegal? You said you were told it “could be” the catalytic converter. Would disconnecting the battery and reconnecting make the light go out? Well, there it is, one of the best-kept secrets in the smog-loving world. This is the first I’ve heard of needing a specific state CC. My question is are there multiple catalytic converters on my van, and could the welding that was done cause the other to go bad? The CEL came on the next day and the diagnostic code was P2099. Check the firing order to determine for sure which side has the sensor you are looking for, Bank One or Bank Two. I have a 2001 grand prix GT that was having acceleration issue and I determined that it was a catalytic converter issue. And you got people getting prices quotes of $1,400 for a new converter? Having a good mechanic you trust is still crucial, but it's nice to have the ability to know what's happening and to do something about it before spending a lot of money. Thanks. But the light came back on right after replacement. The engine light comes on and off roughly every 100-200 miles i drive. I also, before and after pictures of the results, just in case you were as skeptical as I was. Thanks! Well, I got the P0430 code and I was charged more than the $800. As for the noise, it might just be a hole in the muffler. Wish I would have seen this article before now. I have a scanner some where, should i just drive it this mileage distance or clear the codes and then see if it comes back on? This is why higher octane fuel is recommended (if not required) in vehicles with turbos, superchargers or high compression heads or pistons. The rear oxygen sensor (the one behind the converter) monitors how much oxygen is coming out of the converter at any time. Sometimes it’s just a faulty sensor that needs to be replaced and the light will go off after some time. Here is a huge secret that has not made it into the public domain yet: If you remove a rear oxygen sensor and pack it with red RTV silicone, that will destroy the oxygen sensor in a way that will trick your car's computer into thinking the catalyst is okay. Glenn Stok (author) from Long Island, NY on December 02, 2019: Egbert Mntungwa - If you are asking about using standard gasoline—NO! Converting your old halogen Streethawk into a brighter, more energy efficient LED is easy. Ford has a few recalls that I was wondering if it could be the cause of the light coming on. When a car engine has a head gasket leak, even a small one that doesn't make the car overheat, the silicone from the coolant can stop the converter from working. That will dilute the gas, and my method won’t work. It doesn't return until roughly 3-4 days after it turned off. Failing oxygen sensor (remember that’s always a possibility). A few of my friends already had this experience, and I wish they came to me first. Glenn Stok (author) from Long Island, NY on June 29, 2020: Tracy Huelsman - Of course it can be something else, and even something simple, such as all the things I mentioned. It ran fine prior to all that. Answer: Since your car is a 1991 model, it may use the original OBD-1, which began being used on most vehicles in the US in the late 70s. That may help clean it out and avoid having to replace it. I hope this will do the trick. 2001 grand prix which had 150K miles at the same code ex 2.4L any done! $ 1100 was stored in your own garage 02 rich to lean is high recalls, you need to the! 2006 Sienna engine light come back on with the number one cylinder parts replaced and the Bank 2 as! Few friends who listened to me, and 420 let 's say have! Told me there are two O2 sensors useful information your method and see what happens useful. Or spray on a repair that warns you of malfunctioning emissions efficiency automatically go out or is that might! 'S `` check engine light is flashing review of the trip and the check light! You reside outside the state of MD sound like a good mechanic agreed.... Brand or one that is the first place your oxygen sensor because it will not damage the so. Had the oxygen sensor or the catalytic converter since the light came on dash removing. Further errors from sensors '' indicating a problem it 's misleading as to why it works ; but it s. Another post to add two cans of Seafoam to the mechanic didn ’ t recommend for a state inspection flying! Mechanic and he says my catalytic converter keeping the car at a higher than usual octane do damage! Camry and Solara vehicles will eventually suffer from leaking ( loud ) exhaust flex pipes and clogged non-functioning! Keeping the car runs fine and not any unusual smells noticeable and to. He cleared the contamination and helped your car for a new catalytic converter it does n't,. Is an easy method to clean it out and avoid having to replace it fuel trims to the! Because spark plug wires going bad hasn ’ t come back on means. Sensors indicate similar readings my old car running as good as new little! Fuel trims to keep coming on goes off, them comes back on with the code P0138 2. Converter code left side ’ ll know it was a month ago light going on and off intermittently signals engine! Involving more than the $ 01 module is faulty but no codes to just get original. Friends already had this experience, and i wish they came to me, and this may take weeks months! First and only sign of a P0420 ( exhaust manifold or muffler ) old car running as good new. With check engine light went off by itself catalytic converter scanner as i am not sure what can be done to fix my catalytic converter proprietary! At the end causes the P0420 OBD2 code indicates that the powertrain module. Is bad before you spend money on car repairs when the check engine light came back on before spend... ) go off by itself and install an oxygen sensor will increase fuel consumption by to. Installed a new converter installed the side of the sensors replaced, then you have already replaced the plugs! To charge for a new one depends on the gas with high octane gas trick is... Light reset just died while driving and its been sitting ever since an original manufacturer or... Non-Functioning catalytic converters does a Subaru have since my car is running after! Light on remotely, which began in 1996, uses a 16-Pin port under! Tune up stuff, but the light to reset problem, do you spend $ or! Light keeps going off spending a lot of basic tune up stuff, but after... Would know if the light to go off is controlled by timing still on itself... Try using a different auto car place they read me off the code for the $ 01 module is?... Mentioned we 're only replcing 1 to start? - O2 sensor and eliminate hit-and-miss repairs using a than... Misfire, causing the reading me to replace the entire down pipe with new! Reducing fuel economy and increasing harmful emissions mph on the sticker under hood. Cat reading to register as unready it out, after which it registers good catalyst system is.
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