2004 Saturn L300 Repair Question
Asked on December 29, 2012
Saturn L300 Sensor Problem
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.
Asked by (pending member)Answer
Replied on December 29, 2012
this is a cat converter code. you must replace the converter not the sensors.
Roy
