Join Date: Apr 2010
Location: desert near Tucson
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Re: Code P0302 caused by chewed wires
We had a similar experience recently. Visible damage to the wiring harness by pack rats. I kept splicing, got more codes, spliced more. The worst of what I did repair was a harness on the back of the engine, just above the transmission - impossible to see the chewed ends without a scope. I was able to trace the wires back to where the main harness leaves the firewall and splice in new wires. Still had codes.
I finally gave up and called insurance.
A take-down by the shop revealed chewed wires under the intake manifold. $5500 in repairs. Insurance paid all, less $15 for an unrelated license light and the $500 deductible. We have taken several days of rough off-road driving, and we are pleased with the integrity of the repair.