Cadillac Seville / Cadillac Eldorado Forum Discussion, Service Engine Soon! in Past Cadillac Vehicle Discussion; Today I was at the redlight and just happened to notice that my service engine light had came on. I ...
- 03-03-06 02:38 PM #1
Service Engine Soon!
Today I was at the redlight and just happened to notice that my service engine light had came on. I pulled the codes a minute ago and got these:
PCM 0151 heated O2 sensor circuit low voltage bank 2 sensor 1
PCM 0174 Fuel Trim system lean bank 2
PCM 1139 Heated O2 sensor insuff. switching bank 1 sensor 2
This makes sense to a point but performance wise I have no idea what they mean and what caused the codes to appear. Is this major or something that can be corrected. I'll wait for a response before I clear them.
- 03-03-06 06:32 PM #2
Re: Service Engine Soon!
Sounds like 2 sensors failed causing P0174 would be my guess. Bank 2 Sensor 1 is on the front manifold. Bank 1 Sensor 2 is the pre-cat sensor. See if anyone agrees with me.