Engine Performance problem
1996 GMC Jimmy 6 cyl Four Wheel Drive Automatic 257000 miles
My 1996 Jimmy surges. I got DTCs P0440 and P0507.I was told that this usually signifies a faulty oxygen sensor on the exhaust. There are three sensors on the exhaust, how do I test to see which one is bad?
I would like to thank SWilliams for his response to my question.I followed his advice about checking all my vacuum hoses from the purge solinoid and discovered that my pcvalve had split allowing a vacuum leak.I replaced the pcvalve and the problem is now corrected. Thank you again.
Sunday, October 5th, 2008 AT 11:50 AM