Mike ctsV

My oil pressure is always reading 129 psi.
But today for the first time it went blank and i got a shut engine off- no oil pressure warning light on my dash and my nav screen for a few seconds.
So i just kept on driving and didnt hear no funny noises.
So while i was driving i just cylced through all the displays on the steering wheel and it went back to what it always normaly reads at 129 and its been fine.
But anyways, the gauge is always maxed out and it always reads 129 or 130, so i know that cant be right.
Is it a bad sensor or do i need to try to clean some ground wires?

heavymetals

iTrader: (3)

Sounds like you popped the sensor.

You might consider a sensor relocation kit while you're at it.

BudRacing

iTrader: (3)

Yeah, it's either pegged or not functional. I wouldn't be surprised if it's a grounding issue, but I'd probably start with replacing it with a known good sensor first. If that doesn't fix it, tap into the pigtail's ground and run and independent wire to a nearby ground source (or make a new one).

Mike ctsV

What grounds should i check? I see one on the left side on the back bu the battery on the motor, and theres one on the hood strut

Mike ctsV

I ran a new wire from the hood strut ground to the ground on the front passenger side of the block and that didn't change nothing it's still read 129 whether the car was on or the car was off with the key on

Mike ctsV

Also sanded those two grounds and cleaned them up but that didnt do nothing, cant get to the rear pass side ground, i remember moveing it though when i did my header install but its hooked back up i know for sure. Anyways i ordered the oem ac delco d1846a sensor, should have it next weekend

BudRacing

iTrader: (3)

I was referring to the ground directly from the sensor, but it's good that you cleaned up the other main grounds for good measure. If the new sensor doesn't fix the issue, then you will need to look into the ground wire directly off the sensor--bypassing the harness ground. Same fix as the oil temp sensor issue that has plagued this platform. At least it's a simple fix once identified.

Mike ctsV

Ordered a new oem sensor and the lisle socket also. Should have it by the weekend.
But with the key on, motor off, the gauge still reads 129 psi.
And when i unplug it with the key on and motor off, it shows 0 psi.
So im assuming its that sensor?

heavymetals

iTrader: (3)

Sounds like the sensor to me, and I use to pop those things like corn.

You want to pop your new one?

Rev a cold motor.

The vibration doesn't help either, that is why the relocation kit is so neat.

Mike ctsV

Where do u relocate them to

BudRacing

iTrader: (3)

Interesting, I hadn't heard of this being an issue. Knock on wood, mine has been just fine for 13 years.

heavymetals

iTrader: (3)

I cable tied/secured mine to the firewall.

You can do a search for C5 oil pressure sensor relocation kits.

I might have one left over.

Mike ctsV

Got my sensor and socket finally. Heavymetals i seen your post on cadillacfaq torque list, oil sensor is 15 ft lbs?

heavymetals

iTrader: (3)

Sounds about right to me.

I know you are not going to like hearing this, but the brass body sensor is the better one.

The aluminum body ones seem to have a high failure rate.

Mike ctsV

Thats the one ebay sent me, didnt know there was another kind, if this one fails ill get the brass one next time.

Mike ctsV

Installed the sensor lastnite, its working like its suppost to. Yayy

Mike ctsV

Gauge finally works, reads 38 at idle instead of 129 like it always did

kra86

Looking good.