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"They trace the oil leak back to the oil filter housing gasket, so that gets replaced, lines and radiator are flushed out, thermostat replaced, and it's time to check the codes again. Still throwing thermostat fault codes. They find out that, with the bad thermostat having oil/coolant being pushed through it at high pressure, it allowed that mixture to go into the thermostat plug and get pushed through the harness, all the way back to the DME. The connection where that part of the harness hooks to the DME had that mixture on the pins.
That is one of the oddest i've ever heard.
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