2002 GMC Yukon V8 Four Wheel Drive Automatic 133000 miles
I am currenlty having an issue with the Fuel Composition Sensor and getting code F0178. I have replaced the sensor twice, they were both used parts but from a very good salvage yard. Prior to changing the sensor the first time, I took it in to a shop who read the ECM to determine the possible problem and he said 9/10 times the problem is the sensor. So, I purchased a used sensor with 31,000 miles on it and replaced the old one. I cleared the code and did not get a mile down the road and it was back on. I took the car to a shop and they checked the wiring and said I did not have a wiring problem, just a bad sensor. I called the salavage yard and told them the sensor was bad. They gave me a different sensor and I replaced it. I then cleared the code. I started it and let it idle, then turn it off. I then started it and drove about 1 mile with the light out, stopped for gas, then went about a 1/4 of a mile and the light was on again. I have had wiring checked and changed the sensor twice. I cannot imagine all three sensors would be back. I am at a loss trying to solve this problem.
have the same problem?
Tuesday, March 10th, 2009 AT 6:09 PM