O2 Sim
Thread Starter
Instructor
Joined: Feb 2006
Posts: 144
Likes: 0
From: Woodlands TX
O2 Sim
I have been having an ongoing problem with an O2 sensor on the right bank position one. Codes P0157 and P0154. I checked for VAC leaks and exhaulst leaks to eliminate that possibility. I have replaced the sensor twice, first with a Bosche sensor and more recently with a OEM dealer sensor. At first the problem was an on again, off again issue with the SES and some rough idle. Now it is constant.
I have two questions:
1. I see there are O2 Sims for the post CAT sensor. Do they make one for pre CAT. I want to test to see if there may be a short between the sensor and the ECM.
2. I know the post CAT sensor monitors the state of the converter. It appears to be acting fine. No codes. I know this sounds nutts or stupid but can a problem with a CAT cause issues on the front sensor.
I have two questions:
1. I see there are O2 Sims for the post CAT sensor. Do they make one for pre CAT. I want to test to see if there may be a short between the sensor and the ECM.
2. I know the post CAT sensor monitors the state of the converter. It appears to be acting fine. No codes. I know this sounds nutts or stupid but can a problem with a CAT cause issues on the front sensor.
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
1. I see there are O2 Sims for the post CAT sensor. Do they make one for pre CAT.
I want to test to see if there may be a short between the sensor and the ECM.
2. I know this sounds nutts or stupid but can a problem with a CAT cause issues on the front sensor.
Have you followed the diagnostic procedures in the service manual for P0154 and P0157?
Are you sure that 0154 and 0157 are for the same O2 sensor? I only have 0154 in my service manual, and it is for bank 2 #1. Looking up 0157 online, it appears to be for bank2 #2.
Thread Starter
Instructor
Joined: Feb 2006
Posts: 144
Likes: 0
From: Woodlands TX
Yes. I know. It has been driving me insane and at this poiint short of taking it to Corvettes of Houston or a dealership and dumping a ton of money for them to throw parts at it (which if you include my time and parts thus far I already have), I am reaching for straws.
I was just looking at a SIM as a potential way to eliminate the possibility that there may be a short in the harness or that the replacement(s) O2 were faulty which I doubt.
I was just looking at a SIM as a potential way to eliminate the possibility that there may be a short in the harness or that the replacement(s) O2 were faulty which I doubt.
Thread Starter
Instructor
Joined: Feb 2006
Posts: 144
Likes: 0
From: Woodlands TX
Regarding the codes. Yes I have cleared them several times. Actually I have become quire proficient at doing so. I just seems to set either code at random. It even threw a P0174 once.
