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Author Topic: Oil Pressure gauge stuck at 80 and how to test  (Read 2124 times)

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Captain

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Oil Pressure gauge stuck at 80 and how to test
« on: November 30, 2014, 17:38:57 PM »

 This is a way to diagnose an oil pressure switch failure and not a stepper motor.

  If your oil pressure gauge on a 03-06 5.3l is stuck at 80 psi this is a easy fix.
First does the gauge go back to 0 with the engine off and key in the off position? If yes, continue by turning the key to the run position but the engine off, does the gauge go right to 80? If it does then turn the key to the OFF position and go to the rear drivers side of the engine and feel for the switch. Once found unplug the connector from the switch and repeat test. With the key in the ON position the gauge should read 0. Replace the Switch and test again.

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Banjo playing, full time Firefighter Paramedic, Technical scuba diver

avalanchedriver

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Re: Oil Pressure gauge stuck at 80 and how to test
« Reply #1 on: November 30, 2014, 20:43:36 PM »

Nice write up. I had to replace mine this summer. I think the hardest part was blindly reattaching the sensor wire.
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MS03 2500

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Re: Oil Pressure gauge stuck at 80 and how to test
« Reply #2 on: November 30, 2014, 23:10:07 PM »

It's kind of like the fuel pump replacement, drop the tank or cut a hole in the floor. Take the intake manifold off or do that.
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enoniam

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Re: Oil Pressure gauge stuck at 80 and how to test
« Reply #3 on: December 1, 2014, 07:15:21 AM »

Really depends upon how big your hands are.  I couldn't do it but the Mrs. could!   :A:
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2003 with ATK 460 HP 6.0, Speed Engineering Long Tube Headers and true dual 3" exhaust, Truetrac rear, 3200 Circle D Stall, tranny upgraded with 4L65 and other heavy-duty parts, Weld Racing 18x10 forged wheels, HPTuners custom tune, Vortech supercharger, water/meth injection, Magnavolt fuel pump voltage booster, DeatschWerks booster fuel pump, 58#/hr injectors, 13.3 @ 101 in the quarter mile.

Captain

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Re: Oil Pressure gauge stuck at 80 and how to test
« Reply #4 on: December 1, 2014, 07:27:13 AM »

I found that I could reach the sensor if I removed the cover and climbed on top of the engine and reached under the fuel lines.  I did how ever scratch the hell out of my arms and hands.
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Banjo playing, full time Firefighter Paramedic, Technical scuba diver
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