CEL P0685?
Joined: Dec 2009
Posts: 4,032
Likes: 15
you know you should use google more often but here ya go>> "Thanks for the help last year. I apologize for not circling back and updating this post with a final report. I tried to send a PM to Art but I am not certain that it went through.
In any event, the problem did turn out to be the aftermarket battery terminal that my local dealer spliced in when the original terminal became corroded. The splice was installed rather poorly and the corrosion continued into the battery cable. This faulty connection caused a problem with the ECU (IIRC - in any event, the electronic part that was affected was located under the carpet in the front passenger foot well). I've asked my daughter to look at the repair invoice and get the part number for me and I'll post it when I receive that information.
In any event, the dealer in the town where my daughter lives finally diagnosed the problem correctly. They removed the aftermarket terminal splice hack job, installed an OE battery terminal wiring harness and replaced the ECU. The car has run flawlessly since the repair was completed. The total cost was around $900, as I recall. To their credit, my local dealer covered the cost of the diagnosis and ECU repair and reimbursed me for the cost of the original splice hack job that created the problem in the first place. I covered the cost of the proper repair to the battery terminal wiring harness."
In any event, the problem did turn out to be the aftermarket battery terminal that my local dealer spliced in when the original terminal became corroded. The splice was installed rather poorly and the corrosion continued into the battery cable. This faulty connection caused a problem with the ECU (IIRC - in any event, the electronic part that was affected was located under the carpet in the front passenger foot well). I've asked my daughter to look at the repair invoice and get the part number for me and I'll post it when I receive that information.
In any event, the dealer in the town where my daughter lives finally diagnosed the problem correctly. They removed the aftermarket terminal splice hack job, installed an OE battery terminal wiring harness and replaced the ECU. The car has run flawlessly since the repair was completed. The total cost was around $900, as I recall. To their credit, my local dealer covered the cost of the diagnosis and ECU repair and reimbursed me for the cost of the original splice hack job that created the problem in the first place. I covered the cost of the proper repair to the battery terminal wiring harness."
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