UK Car Repair Questions? Ask a Mechanic for Answers ASAP
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If there is oil in the cpu this is due to a leaking sensor on the engine with the oil making its way up the harness to the cpu.The sensors need checked at their electrical plug ins to locate the leaking sensor and that sensor replaced.The wiring harness will need cleaned out and the CPU replaced as the oil damages the cpu internally.
I have also seen issues with weak injector pump.If this was not tested when the vehicle was acting up this needs done to see if an injection pump needs replaced to correct this here as well.
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