Oil light on for 1 second after startup

Mike_D · Aug 27, 2016

Lately I have noticed that after letting my truck sit for around a week without being started, on initial startup I'll see the low oil pressure indicator in the information center of the cluster.

It goes out within a second of the truck running. After driving the truck and restarting, it does not show up again. Even if I drive it a day or two later, it typically will not show up. Only after a long sit.

Any ideas? Thinking maybe the oil drain back could be the culprit. Maybe the oil pressure sensor?

I am running a Motorcraft filter with Delo 15w40 oil. Ambient low temps have been maybe 50* here.

Thanks guys

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White_monster · Aug 28, 2016

What brand oil filter? Sounds like the drain back isn't seating

Mike_D · Aug 28, 2016

Motorcraft FL-2016 every time.

White_monster · Aug 28, 2016

Look at the drain back valve. I've seen them break.

Mike_D · Aug 28, 2016

I'll check that out. If it sits for a week or so, when I pull the oil filter it should still be pretty wet correct?

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White_monster · Aug 28, 2016

That's correct

Mike_D · Aug 28, 2016

Is the drain back valve the part that's built into the stand pipe? Does anyone have a PN?

Thanks

Mike_D · Aug 29, 2016

It looks like the 6.4 and 6.0s use the same PN: 3C3Z6C755AA

Probably going to replace the entire stand pipe vs trying to just change the anti drain back valve at the bottom.