HELP! oil pressure low! gauge dropped to nothing!

[McRat]

At least on the pickups, when you get an honest "no oil pressure", it's not subtle. All kinds of messages and lights.

Most the time I've seen problems it has been the bale connector pins getting pushed in from an Edge/Banks/VA box. But since it has no CEL, it's probably the instrument cluster. If EFILive shows oil pressure, you are good to go.

 

[duratothemax]

But since it has no CEL, it's probably the instrument cluster. If EFILive shows oil pressure, you are good to go.

No pat, low oil pressure wont set a DTC.

I 100% guarantee you its NOT the cluster. Why? Because the cluster gets its info from the ECM. The trigger point for the "low oil pressure" message in the DIC and dinging is determined from the data stream, NOT the oil pressure gauge needle's physical position. If the stepper motor was bad, the gauge would show zero (or maxed out) but there would be NO associated LOW OIL PRESSURE message or dinging.

You can plug in EFILive and check it all you want, but Ill bet you a dozen donuts it will tell you the same thing. Zero PSI.

ben

 

[bullfrogjohnson]

We are checking it right now but keep getting a response error EFI scan. It wont let him log

 

[duratothemax]

As I said above. If you want to easilly diagnose a bad oil pressure sensor on the side of the road, fire up the truck, and crack open the oil line feeding the turbo. If lots of oil comes out, you're fine.

 

[bullfrogjohnson]

As I said above. If you want to easilly diagnose a bad oil pressure sensor on the side of the road, fire up the truck, and crack open the oil line feeding the turbo. If lots of oil comes out, you're fine.

hes doing that right now

 

[lotsofmiles]

Thanks again for all the help!!!

We have oil coming out at the turbo!

A bad sensor?

 

[McRat]

Either that or a connection.

Ben is right, I didn't catch the part where you posted you got the LOW OIL PRESSURE warning message. That means it probably ain't the cluster.

 

[duratothemax]

Thanks again for all the help!!!

We have oil coming out at the turbo!

A bad sensor?

sounds like it

glad its not the oil pump!

ben

 

[McRat]

When my oil pump went, it sounded like crap when I restarted it.

 

[lotsofmiles]

drove the truck 5-10 miles, better parking lot over here. Hooters one one side Chevy dealer on the other...


Cant thank everyone enough for taking the time to help. :hug::hug: I think Travis located a sensor for me, just sitting here waiting for the call back.


http://www.youtube.com/watch?v=Tr6AKgdRLnk

 

[lotsofmiles]

video sounds like crap, truck sounds way better

 

[duratothemax]

does yours not ding when the warning comes up?? Or do you have an aftermarket radio?

 

[lotsofmiles]

aftermarket radio...


strikin out on the part so far....
Posted via Mobile Device

 

[bullfrogjohnson]

Does anyone know the GM part number for the sensor?

 

[bullfrogjohnson]

Gm part # is 98027456 for the 03-07 trucks

 

[Kat]

Gm part # is 98027456 for the 03-07 trucks

I copied this post into part # for future reference

 

[JoshH]

Is there any way you can power or ground a wire at the sensor connection to make sure the wiring is in fact good?

 

[bullfrogjohnson]

Is there any way you can power or ground a wire at the sensor connection to make sure the wiring is in fact good?

You should be able to put a jumper wire in the connector and make the guage peg out to check the wiring

 

[JoshH]

You should be able to put a jumper wire in the connector and make the guage peg out to check the wiring

Do you know if that has that been tried yet? I would want to make sure the sensor was in fact bad before I changed it and still had no oil pressure showing.

 

[lotsofmiles]

will test wires 1st thanks.


been on the eway 45 minutes or so. everything is good so far...
Posted via Mobile Device