BruceUK

Can the oil pressure gauge sender go faulty such that the gauge reads max all the time the engine is running. Oil pressure warning light works OK, its just the gauge.

thomasmryan

the sender has two outputs so yes, one side can go bad.

gtroth

Yes that is the usual failure mode.

Voith

Is one output 0/1 and the other Ω range?

BruceUK

Thanks for the replies, got new sender ordered, collect and fit Monday.

markl951

On one of my old sensors, the gauge wire terminal came loose from the black insulator on the sensor case & spun until the wire broke off on the inside. The gauge potentiometer (10-184 ohms) is connected to the red wire in the view on the left. The warning light switch is connected to the black wire in the right side view. That switch is closed in the photo because there's no oil pressure keeping it open.

Noahs944

My oil gauge read 0 pressure when running but that was due to dirt/corrosion on the sensor terminal.

marc abrams

Another example of German over engineering! I thought I was looking at a Swiss watch. Now I understand why that sending unit is over a $100.

CVR_Rally

I have a similar issue but it pegs full even with the engine off. It was working then started jumping. I replaced the sensor and it worked at first till it hit half way then pegged. Either wiring is bad or the gauge is shorting.