Hello There,
I have this fault on my Audi 80 2.8.
I have tried everything i think of, next stop is the loom.
i have changed all the sensors, fitted a mechanical gauge, 75psi at idle and 100psi at 3k rpm, and it is at 3000rpm the signle is being activated then when the revs drop the warnings start. There is nothing wrong with my car yet Audi refuse to admit there must be a fault somewhere.
i have swapped the senders, shorted them out, run new cables from senders and still this problem remains, i can only assume now that the ECU is bonkers.
the only thing left to do is poke the sounder with a large hammer and rip out the oil pressure lamp
regards
wpc80
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