I was having a intermittant CEL 1224 so replaced the o2 sensor. No more CEL but smells like it's running too rich. Otherwise running fine but havn't driven much yet since replacement.

In MY 95 (OBDI) is there an ECU reset be done or do I need to go through any rediness code reset procedure like on the OBDII cars?

Thanks!

 

Bump for Mark!

I need to keep an eye on this one too. I'm getting the same CEL code but have not replaced it just yet.

 

bump and update.

Did some driving around over weekend and it seems that the fumes may be lessening. Perhaps ECU reseting fuel mixture? Still would like to know how the system is designed to work in this situation.

 

When the O2 goes bad it defaults to running rich IIRC. It will take some driving but it will reset.

 

I had a similar problem a couple of years ago, and the car failed it's California smorg test. turned out that there was an injector that was mislabeled - ie the box said the right part # and the part showed a different part#.

Maybe worth checking

 

I had the opposite experience. I had an O2 sensor start to go out and the CEL code I got was lean condition in the right bank. I've since replaced all four O2 sensors and the CEL has not come back on after about 280 miles.

 

Rick,

I think we are saying the same thing. When the O2 sensor goes or starts to go, it often gives false lean codes. The ECU tries to compensate by running richer (even though it is probably not running too lean). Thus the car running too rich until the ECU catches up following an O2 sensor replacement.

 

Tell me about it. Mine belched out pure 98 octane when the sensor went. Left the battery unhooked for 24 hours after I'd replaced it, and it took about 100 miles before things returned to normal.

Peter R.