Engine Performance problem
1996 Mercury Mystique 6 cyl Four Wheel Drive Automatic 89000 miles
Hi I had a diagnostic run on my car and it indicated the code for a fault in the upstream oxygen sensor but I had already replaced but didn't have the code erased. After having that done it came back on again and again it showed a default in the sensor so I had it exchanged for a new one figuring the other was defected but the light still comes on. The only code indicated in the diagnostic is for that sensor. Is there something else it could be that would cause it to indicate the sensor? Thank you.
Monday, May 25th, 2009 AT 2:41 PM