BECOME A MEMBER
Sign up with Facebook
I AGREE TO THE
Login with Facebook
BECOME A MEMBER
I DID NOT PASS SMOG
2004 Saturn L300
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.
Saturday, December 29th, 2012 AT 4:00 PM
This is a cat converter code. You must replace the converter not the sensors.
Saturday, December 29th, 2012 AT 4:01 PM
to post a reply.
1995 Saturn Sl1 Smog Failed
Engine performance problem 1995 saturn sl1 4 cyl front wheel drive manual 185000 miles i failed the smog test idling at 798rpm
1995 Saturn Sl2 1995 Saturn Sl2 Narrowly Failed...
Engine performance problem 1995 saturn sl2 4 cyl front wheel drive manual 125000 miles my hc measurement was barely out of range
Failed Emissions Inspection Because Of Computer ...
I wrote you two days ago and even sent in a donation but didn't get an answer just a receipt how long does it take to get an answer
2000 Saturn Sl2 Failed Emissions
Computer problem 2000 saturn sl2 4 cyl four wheel drive automatic 115988 miles service engine soon light came on approximately wee
Found 750 related questions
2000 Saturn Failing Emission Inspections
Saturn Emission Test Fail
Manuals and Instructions
Fail Your Smog Test? Fix it Fast
Ask a Car Question. It's Free!
Find a car manual for your car
My Car Safe With The Check Engine Light On?
Is it Safe to Drive Check Engine Light
Read your own check engine light codes
© 1999 - 2016 2CarPros, Inc.