So about two weeks ago, I had posted about an O2 sensor code I got (right bank). The light was on and all that. I kinda put it out of my mind after that and I was going to get to it later. Now the CEL is out. (The light still works, BTW). I haven't had the time to pull codes yet. Is this possible? Maybe it was just an electrical glitch?
I just did a 500-odd mile trip and it was all good. I kept waiting for the CEL to come back, but everything appears to be fine.

 

it seems the underpants knomes have resorted to stealing CEL codes...

 

Soooo, is this something that has happened to anyone else?

 

O2 codes will turn the light on and off after so many miles.....dont worry its still in ur ECU

 

Thanks. That's interesting. It'll turn the light off for some codes but not for others? When I got my EGR code, the CEL stayed on until I fixed the problem. Oh well....I'll be replacing it this weekend. One more thing. Is it advisable to replace BOTH or just the one? Most of the stores want to sell two.