Flickering oil pressure light

Noticed something today that I never noticed before. While cranking the truck to start the oil pressure light flickered. Truck was off all day while at work. The light remains off during run time and driving.

When restarting after a short "off" period, it doesn't flicker.

Is what I am seeing normal?

 

I wouldn't worry about it until it comes on 'constant'

Check your oil or change your oil recently?

 

Oil and filter are about 2500 km old. Level is good to my knowledge. I've been taking a video every time I start the truck in an attempt to capture what I mean by flickering.

Will post a video if I get a good one. Bad oil pressure sensor or leaking back flow valve on the filter were two suggestions I had so far, from a mechanic I trust. Just wanted other opinions from here.

Thanks Janster.

 

Yep, looks like a leaking anti-drainback valve. Just replace the oil filter. No need to worry as long as the light isn't on during normal idling and driving.

 

Thanks.

 

Started the truck up this afternoon. It sat all night last night, and this morning.

Flickering light:



First start after new oil and (empty) filter.

$48 Toyota 90915-YZZD3 Oil Filter 1 Case (QTY 10)

Toyota 90915-YZZD3:



Shut engine off, restarted within 10 seconds:

 

Seems normal to me; 1-2 sec to fill the filter on empty filter is normal for all my oil changes. Flickering while starting is probably a good sign; as the OP builds even during cranking which it wouldn't if it had drained back completely (to an empty filter)
imho; nothing to worry about

 

Started the truck after sitting for two days (took the work truck out of town)... The OP light flickered on the first start, just not as much as with my original posts. This is with a new filter, new oil. Maybe I never noticed the flickering on the first start before. Not going to worry for now. For the sake of curiosity, I'll see what the light does tomorrow morning after sitting overnight.

 

My OP light stays on solid during first thing in the morning start-ups. I usually don't see it again until the next morning. Flickering OP lights scare the shittalkin' mushrooms outta me, though, as that was my brief indication (for maybe 2 miles an intermittent momentary flicker that I thought I saw but wasn't sure until I looked down at the right moment) that my rear main had blown on a pass, before I saw the cloud of smoke and my engine ate itself, that is. Keep a close eye on it, I'd say. But I may just be paranoid.

 

Just a quick follow up to say it's all good now. New filter fixed the problem. Cranking after sitting overnight no longer causes the oil pressure light to flicker.

Thanks for all the replies.