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[Artic Boy]

The oil light on my '02 Omega 2.2 DTi has just started coming on when the engine is at normal running temp and only below 1200 rpm. It goes out above these revs. The oil is clean and to level. Has covered 89k trouble free miles. No rattles and runs as it has always has. Any ideas? Oil pressure switch maybe? :-/

[freecall666]

try the sensor on drivers side bottom of the engine, check the plug to the sensor. can get full of water and road muck, did it a lot on mine so change'd the seal on the plug and it stopped.

[TheBoy]

Wonder if the pressure releif valve has stuck open.

[Kevin Wood]

Wonder if the pressure releif valve has stuck open.

Yep, that would be my main concern, followed by a clogged pickup strainer.

It might well be an issue with the switch, but the consequences of driving it with low oil pressure (wrecking the whole engine) would prompt me to check out the important bits first.

I would say get an oil pressure test gauge and connect it up to see how much oil pressure you've really got.

[TheBoy]

Wonder if the pressure releif valve has stuck open.

Yep, that would be my main concern, followed by a clogged pickup strainer.

It might well be an issue with the switch, but the consequences of driving it with low oil pressure (wrecking the whole engine) would prompt me to check out the important bits first.

I would say get an oil pressure test gauge and connect it up to see how much oil pressure you've really got.

For my own understanding, would that cause the light more at high rpm?

[Andy B]

Wonder if the pressure releif valve has stuck open.

Yep, that would be my main concern, followed by a clogged pickup strainer.

It might well be an issue with the switch, but the consequences of driving it with low oil pressure (wrecking the whole engine) would prompt me to check out the important bits first.

I would say get an oil pressure test gauge and connect it up to see how much oil pressure you've really got.

For my own understanding, would that cause the light more at high rpm?

Maybe at very high rpm, but the above symptoms were exactly what SWMBO's car showed when the pick-up strainer was partially blocked. 

[Kevin Wood]

Wonder if the pressure releif valve has stuck open.

Yep, that would be my main concern, followed by a clogged pickup strainer.

It might well be an issue with the switch, but the consequences of driving it with low oil pressure (wrecking the whole engine) would prompt me to check out the important bits first.

I would say get an oil pressure test gauge and connect it up to see how much oil pressure you've really got.

For my own understanding, would that cause the light more at high rpm?

Maybe at very high rpm, but the above symptoms were exactly what SWMBO's car showed when the pick-up strainer was partially blocked. 

Oil pump gets more effective at higher RPM so more likely to draw enough oil through the crud.

[Andy B]

Wonder if the pressure releif valve has stuck open.

Yep, that would be my main concern, followed by a clogged pickup strainer.

It might well be an issue with the switch, but the consequences of driving it with low oil pressure (wrecking the whole engine) would prompt me to check out the important bits first.

I would say get an oil pressure test gauge and connect it up to see how much oil pressure you've really got.

For my own understanding, would that cause the light more at high rpm?

Maybe at very high rpm, but the above symptoms were exactly what SWMBO's car showed when the pick-up strainer was partially blocked. 

Oil pump gets more effective at higher RPM so more likely to draw enough oil through the crud.

Exactly .......... but will there be enough oil at very high revs? 

[TheBoy]

Wonder if the pressure releif valve has stuck open.

Yep, that would be my main concern, followed by a clogged pickup strainer.

It might well be an issue with the switch, but the consequences of driving it with low oil pressure (wrecking the whole engine) would prompt me to check out the important bits first.

I would say get an oil pressure test gauge and connect it up to see how much oil pressure you've really got.

For my own understanding, would that cause the light more at high rpm?

Maybe at very high rpm, but the above symptoms were exactly what SWMBO's car showed when the pick-up strainer was partially blocked. 

Oil pump gets more effective at higher RPM so more likely to draw enough oil through the crud.

Thanks Kevin Wood

I certainly wouldn't be pissing around with sensors anyway, there is something far more serious going on.