Hello,

I'm getting a weird thing happen on my car which has not long started happening. Sometimes (mostly after I've had the car running) when I go to restart the car (lets say this is immediately after turning the engine off) and its doing all the check things on the dash the red oil indicator light doesnt come on and after about 5 to 10 seconds I'll get the yellow warning triangle (the one with the exclamation mark in it) light up. but if I leave the car about 30 to 40 seconds before turning the key everything comes on fine (including the oil can light thing) and no warning triangle.

I've looked around the forum and I noticed that this could be the oil pressure switch? I was just wondering why it was intermittent? Has anyone had experience with this before? Could there be an issue with the switch or could there be an issue elsewhere? Is there a relay that I could possibly change myself or should I take it and get the oil pressure switch changed?

Thanks for any help and advice.

What year and engine?

Is that 100% repeatable ?
If so, my guess is that some oïl pressure remains in the system and the sensor is not yet grounded when you restart the engine immediately.
I suppose the ECU during initial check verify if the oïl sensor is grounded (normal condition) and as it is not, throw the yellow triangle to say Something was detected wrong ...

You could disconnect the sensor and check WHEN it grounds itself after engine stop, using a multimeter or a bulb from sensor pin to battery +.

Also, there is no relay involved here. Oil sensor is K030 on the drawing.

BRs, Bernie

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varesecrazy said:

What year and engine?

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Its a 2006 1.2v.

Bernievarian said:

Also, there is no relay involved here. Oil sensor is K030 on the drawing.

Click to expand...

No, its not 100% repeatable, it happens most of the time though, when turning the engine off and then back on immediately. I did notice today though, that when turning the ignition on the first step, the oil warning light (I guess its the oil warning light - it looks like an old fasioned oil can) didn't come on, but I didn't get the yellow warning triangle and after about 15 seconds the oil light turned on. Would it be worth changing the oil pressure switch? I assume thats also the same one for the oil warning light? My neightbour said that the switch is really cheap and he could change it in about 20 mins.

The oil sensor is connected to the body computer, itself connected to the Dashboard, so yes, it drives the oil light.
It's indeed cheap and easy to replace, but you'd better find why there is this residual pressure (clogged filter ?) or if the sensor was actually dying ...

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)

Bernievarian said:

The oil sensor is connected to the body computer, itself connected to the Dashboard, so yes, it drives the oil light.
It's indeed cheap and easy to replace, but you'd better find why there is this residual pressure (clogged filter ?) or if the sensor was actually dying ...

Click to expand...

Thank you for the help, I think I'll have both the switch and the oil filter changed as both seem really cheap on an auto factors website. Hopefully that will cure the problems. I'll post again if changing both do so.