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Re: Check engine light mystery Posted by doug [Email] ![]() ![]() In Reply to: Re: Check engine light mystery, David in Michigan, Sun, 12 Jul 2009 14:22:40 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Jerry,you may want to unplug and reconnect the rear o2 sensor. The pothole perhaps giggled something loose. I had been chasing the same fault code on my 1999 v6 9.5. The fix was to run a jumper between pin 1 of front and rear o2 sensor plugs. They are connected at j20 in the wiring harness from the factory. J20 is a known to be a problem on occasion. I found the problem when I used an ohm meter across pin 1 of both connectors [Female end] and gave them a little tug that caused a loss of continuity. The problem had been ongoing intermittently for more that a year.Jumpering solved it. Hope this is of some help to you Cheers Doug
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