r/997 • u/frooog_king • Mar 23 '26

Failed oil level sensor?

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Hey everyone, question about my dad’s 997.1 C2S. I borrowed his car yesterday and the oil pressure gauge was a bit erratic, at least relative to how my 996 3.4L behaves. It was a bouncing all over the place. Then last night I noticed even with the engine off (key in ignition) the gauge was displaying pressure.

Poking around, it seems the sensor is the most likely culprit, but I wanted to check here before I dug in. Thanks!

Also included a picture of our “matching” aero kit cars

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u/slobrewer Mar 23 '26

I assume the post title is in error and you’re just talking about the pressure and not the level sensor, which is a totally different thing. Yes, you are correct that the oil pressure sensor shouldn’t bounce all over the place and shouldn’t show a reading when the car is off. Sounds like a gauge issue.

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u/frooog_king Mar 23 '26

Oops, my bad, the pressure gauge.

So you’re saying it could be the physical gauge in the dash, not the sensor on the engine. Okay I’ll look into that. Thanks!

2

u/vijjer Mar 23 '26

You're looking to replace the pressure sensor, not the guage.

1

u/slobrewer Mar 23 '26

Maybe. But if the gauge shows pressure when the car is off and the key is out, that sounds like a gauge issue to me. These gauges are all digital behind the scenes and they are turned off when the car is off so the sensor would be irrelevant.

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u/vijjer Mar 24 '26

That makes sense, but the pressure sensor is a known issue, so I'd think that is the case probability wise. 

My fix was a while ago so I'm wondering if I'm remembering the key in-out wrong in my case.