I DID NOT PASS SMOG

2004 Saturn L300

Tiny

Anonymous

December, 29, 2012 AT 4:00 PM

I did not pass smog. May you please advise what is code p421. I changed one sensor which (bank 1) but engine lite is still on. How many sensors in this model. My engine size is 6v. Bngine.

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1 Answer

Tiny

ASEMaster6371

December, 29, 2012 AT 4:01 PM

This is a cat converter code. You must replace the converter not the sensors.

Roy

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