Oil light flickers on at idle

[adm333]

Folks

The latest in-dash entertainment I am getting in the P38 is the occasional oil light coming on for 10 or 15 seconds at a time.

So far it only happens at idle, say sitting at the lights.

As soon as it gets some revs it disappears.

Oil was changed about 6 weeks & 2000 kms ago, and is still full.

Anyone else had this scenario ?

[bee utey]

Folks

The latest in-dash entertainment I am getting in the P38 is the occasional oil light coming on for 10 or 15 seconds at a time.

So far it only happens at idle, say sitting at the lights.

As soon as it gets some revs it disappears.

Oil was changed about 6 weeks & 2000 kms ago, and is still full.

Anyone else had this scenario ?

Changed the oil pressure switch lately? A common failure mode. Often with oil dripping off the end of the switch.

[RR P38]

Definitely not normal.
I have never had this in 11yrs.
What milage have you got on the 38?
I would be investigating the wiring from the pressure sender, could be a bad connection. Take it off give it a clean make sure its a tight fit.
Pressure relief spring could be shot?
Or you have a bung sensor?
Or your engine/oil pump is worn out.(at idle this would be more evident)
What is your idle speed? In drive and neutral?

[PeterH]

I would usually suspect the sensor first before delving deeper into other possibilities.
Could just be on the way out and gving weird readings.

[vnx205]

It has happened to me about three times in the last forty seven years. Each time it was a faulty oil pressure switch. The most recent time was just last year.

So I agree with bee utey and PeterH. It is fairly common and the cheapest of all the possibilities to try first.