Hi. I'm having problems with my A4 Cabriolet 3.0. I had water in my fuse box and many other place and it messed up everything.
Had to change my oil sensor (bought a cheap one on Ebay)
Everything is fixed now but I keep getting Oil Sensor light on (orange) once the engine warms up. Temperature gauge works and everything is OK for about 5 miles. Then Sensor light comes on once it gets to normal running temperature.

If I let it sit the light goes off and comes back on after few miles again. VCDS doesnt read it as fault either.

my guess is that its a crappy sensor.
Any ideas?
Could it be because of cheap sensor or because my oil is right to the max?

also any advice where to get a OEM sensor?
I read that meyle sensors cause problems with temperature gauge so I want to avoid them. Hella maybe? not sure where to buy it. Found some on Ebay but they look as fake as the one I put in last week!

Audi want £90 for a sensor - 1J0907660B
Any chance I can get it cheaper elsewhere?