Quote:
Originally Posted by Clodfobble
... and if they tell me I need new catalytic converters, I'll just tell them no and start figuring out how to wreck the thing for an insurance payout.
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If you need new converters, then an engine defect caused premature converter failure.
I mentioned two oxygen sensors. One before the converter and one after. Many cars do not use a sensor after the converter. But all must have the sensor before. Why would an engine problem cause its computer to detect those errors? A first sensor is giving bad numbers. Engine responds with a bad fuel to air ratio. Then a sensor after the converter reads bad numbers.
You don't know what to replace. This is just one likely suggestion. A likely suspect is one oxygen sensor causing bad numbers or improper engine operation. I see no reason to jump to a bad catalytic converter conclusion. Follow the evidence before fixing anything. The above scenario describes one possible reason for those codes.