bmw 730d. keeps displaying a oil level warning light when engine switched off, also misfires when starting from cold. So Tested All Supplies and earths and ok. Found oil sensor Supply voltage and Glow plug Supply Voltages at 8volts.
lots of dismantling time later to expose the glow plug relay managed to test wiring back to supply fuses in engine bay. no fault found with the wiring at all.
Has anybody Ever had a similar or could offer any advice. thankyou
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