Intermittent oil pressure gauge gremlin 2003 Sequoia 4.7 4wd

Red Skeleton · Apr 14, 2026

Had mine for 10 years and haven't heard a solution. It will go to zero randomly at any speed. I just ignore it but would like to fix it. I replaced the sender so it must be in the gauge or cluster. I've read it is common in the Sequoia and was wondering if some clever person actually figured it out? Thanks!

TXA55hole · Apr 16, 2026

Following!

Red Skeleton · Apr 20, 2026

I guess there's no clever and curious people out there.

Red Skeleton · May 7, 2026

Red Skeleton said:
Had mine for 10 years and haven't heard a solution. It will go to zero randomly at any speed. I just ignore it but would like to fix it. I replaced the sender so it must be in the gauge or cluster. I've read it is common in the Sequoia and was wondering if some clever person actually figured it out? Thanks!

Crickets...

SuperSequoia · Jun 20, 2026

Red Skeleton said:
Crickets...

Yo! U are not alone, Fellow 1st gen owner here to simply throw some support your way. Dont have the issue, I assume at this point, you have checked your oil pressure? If you haven't, u should. After that correcting is most likely your gage cluster. Ebay away. Any other electrical gremlins? That it could be something bigger?

Red Skeleton · Jun 25, 2026

Problem with swapping the cluster is I lose the true odometer reading. I can live with it but there has to be a solution.

SuperSequoia · Jun 26, 2026

Red Skeleton said:
Problem with swapping the cluster is I lose the true odometer reading. I can live with it but there has to be a solution.

Generally, again haven't researched but the sending units can go bad also. Maybe a cheap throw a part at it option. Provided, you checked the oil pressure and its good.

JAFO44 · Jun 29, 2026

Red Skeleton said:
Had mine for 10 years and haven't heard a solution. It will go to zero randomly at any speed. I just ignore it but would like to fix it. I replaced the sender so it must be in the gauge or cluster. I've read it is common in the Sequoia and was wondering if some clever person actually figured it out? Thanks!

I also have the 1stGen 07 Limited although only 157k miles do not have this issue BUT.....have seen it before on other vehicle,

The 2UZ-FE engine has a mesh screen filter located on the oil pump pickup tube inside the oil pan.
The primary line of defense for filtering engine oil is spin-on external oil filter.
However, the submerged pickup tube includes a metal strainer screen designed to prevent larger debris or heavy sludge from entering the oil pump\ucked up from pan.
Its a job for a shop, (reputable Toyo truck shop preferably IMOO) Before having the pick-up tube screen replaced (Part not expensive, labor is)

Determine some parameters first and determine the probability of moving forward, like;

Q How many miles on it before I got it (Was previous owner changing oil every 3,000\3 months what Vis oil? was it (HMO) high mileage oil? HMO will restrict oil pressure as it has more detergents hense more gumming over time.
Q - How many miles on it now
Q - WHen does oil light come on Deecceloratingoff highway, rolling to stop light but is not lit when above say 1500 RPM? You need to nail down at what RPM it triggers and is your foot on the gas or not. THis is critical info for the mechanic.
(high mileage oil was cause of wifes Hummer H3 pick up line strainer triggering oil light)

The 1stGen is not seen much in most garages, find a shop (Not dealer, not ORW) that specializes in Toyo\Lexus ONLY or even better a offroad truck shop. Good luck and remember...
"USE ONLY GENUINE TOYO PARTS"

Red Skeleton · Jul 20, 2026

I need to find the site where this gremlin is well documented. It's NOT oil pressure, it's the oil Gauge. Pressure gauge varies all over the place including zero. I replaced the sender We've driven it thousands of miles and if the oil pressure went to zero it would last only seconds before the engine blew.
I appreciate you're suggestions.

Red Skeleton · Jul 20, 2026

This is what it looks like

Twowong4words · Jul 29, 2026

Pretty sure on a 2003 the oil pressure gauge works even without the body control module plugged it so my assumption is the sender is directly connected to the dash cluster.

It's possible it's just the cluster going bad but other things to check is the wiring at the plug itself.

This is the oil sender, located on the back of the oil filter housing, left front lower of the engine. Pull the connector and ensure there's not a bunch of oil in the connector itself. Typically oil in the plug won't stop it from working but contamination can sometimes cause issues.

The harness wraps around the bottom of the oil filter adapter housing and comes up here. The wire being bent around that area could cause a wire to fail internally or the wire to break externally.

Something that is not uncommon is when the timing belt is done, people will route this wiring harness around the outside of the fan pulley bracket which A. Can cause the wiring in the previous picture to stretch or remain under strain and B. If not properly secured it could come in contact with the serpentine belt between the upper idler and A/C pulley.

Proper routing is under the fan bracket but re routing it after the fact is kind of a PITA. It is suppose to be here: (LH cam pulley cover removed in picture)

.

I would suggest making sure the wire is not routes wrong and is not rubbing on the serpentine. Belt. Check the sender connector for oil, clean it out if so and if doing all this causes different behavior in the oil pressure gauge it's possible moving around the wires made a break in the wire break completely OR if it starts working, temporarily completed the connection which would indicate an issue in the harness, most likely at that lowest point where it comes up around the housing. It's possible that's also why people In the past who replaced the sender had luck, moving the harness caused it to no longer be an open circuit and the sender itself actually worked fine. Good luck and let us know if you figure it out please.