Contour Enthusiasts Group Archives Forums General Troubleshooting A P0420 fix . The saga.

Now that I'm posting I bet my CEL comes back on. In order to narrow down a P0420 code I swapped downstream O2 sensors and cleared the code. It's been 8 days now with a 400 mile round trip to Reno in between. I even took it to get smogged for my registration, it passed. My conclusion: Bad connection on the sensors. A question though. I had a pre-test on the smog and everything passed with flying colors but on the official test the NO was close to the high limit. Why?

on my 95 se, both o2 sensors were dead, passed with flying colors for the smog stuff. I was very suprised.

It's a real racket. It cost me close to $100 for that *##@! test.

damn cost me $15.00, when I went to do the test I figured it would fail and I would have to fix somethings and they would tell me who I could go to, to get it fixed, and when they said your gas cap failed, i went and bought one and bamn it was done.