![]() ![]() Checking your O2 sensors will tell you if you need new O2 sensors or a new catalytic converter. If they are working properly O2 sensor 1 should constantly fluctuate between 0.1V – 0.9V and O2 sensor 2 should be steady. Your exhaust system has two O2 sensors (oxygen sensors), one before the catalytic converter (O2 Sensor 1) and one after the catalytic converter (O2 Sensor 2). Tools Needed: FIXD Sensor Or Multimeter/Butane Torch ĭifficulty Level: Beginner (With FIXD) – Advanced (With Multimeter) Click here to join FIXD Premium for free. After the first 14 days you’ll be charged the normal amount, but you can get a full refund up to 30 days after that. If you need any help or expert advice you can call the FIXD Mechanic Hotline for free to get specific answers for your car’s problems.Ĭons: FIXD is free for the first 14 days of membership, which should be enough time to fix your car with the help of our on-call mechanics. You’ll also be able to read live data from your car’s sensors to diagnose your problems. Pros: With FIXD you’ll be able to scan your codes yourself. Not only will you pay for the parts, but you’ll have to pay for labor. Mechanics usually charge about $100 for a diagnosis, but they typically deduct this cost from your bill if you get them to fix the problem too.Ĭons: This is probably the most expensive option. Pros: A mechanic will be able to scan your car and will be able to figure out what is the root cause of your problems and fix it. If you want them to clear your check engine light, they might not be willing to do that for liability reasons. You’ll still have to go to a mechanic or figure that out for yourself. They will scan your car and let you know all of the codes on your car.Ĭons: The downside is they won’t tell you what is causing your error codes. Pros: The main benefit of this is that you get your answer for free. There are a few options for this: Get a scan at AutoZone The only way to know if you have other codes is to use an OBD2 scanner. If you replace your catalytic converter without fixing the root cause, your new catalytic converter will fail too. For instance, if a P0300 (cylinder misfire) or P0172 (too much fuel in air/fuel mixture) can cause a catalytic converter to fail. Before you fix anything related to P0420 make sure you don’t have any other error codes because they could be the cause of your P0420. ![]()
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