Printable View
I just replaced my front O2 sensor. The old one was coated with a whitish ash-like coating, resembling what I usually find on spark plugs.
If I were to remove and check the rear O2 sensor for a similar coating, is there a cleaner (such as brake cleaner or electrical contact cleaner) that would be safe to use to remove the coating without damaging the sensor?
Thanks,
No clue if you can clean them.
What did you figure out?
I haven't figured much of anything out, yet. I replaced the front sensor as it had at least 100K on it, the exhaust smelled like the car was running a bit rich, and a post on the pointy board stated that replacing an inefficient front O2 sensor helped eliminate a persistent P0420. Hopefully, replacing this sensor will keep me from buying a fourth cat since buying the car in Aug 2007. I'll pull codes again this week to see if the persistent P0420 went away.
If you keep blowing cats, have you looked at the coils? A bad coil kills the cat with a quickness on these cars.
That said, I've got the rich smell and P0420 myself...
A p0420 means the cat's already dead most likely unfortunately.
I was kinda hoping threads similar to this one were correct. I guess I'll order a new cat as well if the code comes back.
Let me know if you P0420 stays away. I'd love to get id of mine :D