Thread: 2000 Camry Check engine Light w/P0420
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Old 03-15-2006, 08:37 AM
nbaptist nbaptist is offline
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Red face Re: 2000 Camry Check engine Light w/P0420
Quote:
Originally Posted by Brian R.
Yes, it could be the HO2 sensors. The ECM determines that you have a problem with the catalytic converter by comparing the signals of the two HO2 sensors, before and after the CC. If one of both the HO2 sensors are bad, you will get a P0420. Replace these before you replace the CC. Much cheaper. 100k is a reasonable life span for the HO2 sensors.
Brian,

Thanks I will find out about the parts. One question, if th O2 sensors are bad wouldn't the CEL stay on all the time, for that matter if it were the converter wouldn't the CEL stay on all the time for the same reason?

Thanks

Neil
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