What is your question?
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What is your question?
Also, got an oil change with the inspection. Car was running fine before this. Now has P0421. If there was an issue with the catalytic convertor, how did it pass inspection. Is it safe to drive?
1 Reply
Hello, emissions testing is performed and results are based off of what is happening at the time your vehicle is being tested, as well as what is in "history" in recent times. Apparently, all went well for you. Although this trouble code can indicate a catalytic converter is not working as designed, it can also mean other things and warrants hands on testing. www.repairpal.com/repair-shops
Your car is fine to drive however, I recommend getting it repaired. Most times, we have found that your spark plugs need to be replaced to solve a p0420 and p0421 DTC.