: "Service Engine Soon" on DIC

07-14-05, 03:54 AM
The car sat for a few days and now I get this.
I can push a button and clear the DIC.
Car starts and runs just fine.
I go to the Message Center and the OIL PRESSURE is "---":eek:
Oil temp is ok (185)
Everything else reads normal.
No lights/indicators are flashing and no chimes.

Oil was changed by dealer about 1.5k miles ago but pre-maggie.

Back to the dealer today.

Wish me luck!

07-14-05, 07:46 AM
:bonkers: :bonkers: :banghead: Pleas tell me that you are getting the car towed in????? When ever the oil light is on shut her off and tow her. even if the oil level is full, you may have low oil pressure but oil level be correct. You may not hear a noise but it may be doing harm without you knowing about till its to late. Well good luck and let us know what happened.



07-14-05, 07:48 AM
If you still have your OnStar subscription, have them do a remote diagnosis.

07-14-05, 11:14 AM
Drove car to dealer.

No warning lights or chimes or flashing anything.:hmm:

Just "Service Engine Soon" on the DIC & no oil pressure indication from the Message Center.:helpless:

Service writer says that there is an oil pressure switch (for the warning light) and a sensor for pressure. He thinks sensor (PLEASE OH PLEASE!!!).

Will keep updating as I get more info.

07-14-05, 04:12 PM
if you didnt hear rod knock on the drive over, then you are probably fine.. it may just be the sensor... the car would have done more than just give you a warning if the oil PSI was actually at 0 (i think....)


07-14-05, 09:45 PM
Ok, here is what the dealer thinks.

Bad sensor.


The +5 volts is at the sensor as is the .2 volt reference.

Tech 2 shows no voltage and -15 lbs of pressure.

Since you can't have negative oil pressure (seems like a reasonable deduction) fault goes to the sensor.

The downside:

The mechanic (who is a real nice guy) says he can't get at the sensor without pulling the supercharger off:suspense:
I didn't want to argue as I do have smaller hands and yet he was still able to unplug the thing so we could troubleshoot, just not unscrew it.
I think it can be done, so they are ordering the sensor and they said,"you install it".

So if any of you other gearheads have a list of the size of the socket I need and extensions and universals that it is gonna require, Please post it!

Will keep you posted on progress, but in the meantime I am driving Mr. Vette.

07-16-05, 04:01 PM
Ok, update.

Took a real good look at the oil pressure sensor and it's location.


The replacement anti-knock sensor plate is touching the sensor and about 1/4 inch of material has to be ground off to faqcillitate removal.
Might be able to dremel or at worst my brother the dentist has offered to use his portable belt drive with a carbide tip on it.

Either way, the maggie IS NOT COMMING OFF!

I will post pictures for those who care.

Bottom line, when installing a maggie make sure you have clearance to get at the sensors at the rear of the motor.

Right now I am removing the windshield wiper assembly fo a better peek.

07-16-05, 05:22 PM

Mr. Dremel earned his keep.:worship:

After removing the windshield wiper unit (blades, facia, the works) I got a "clear shot" at the sensor.
Removed the interferring material.

Just to confirm the diagnosis I connected the 5 volt line through a 10k ohm resistor to the signal out and BINGO! instant oil pressure on the Message Center.

So now I wait for a new sensor.

At least I didn't blow up my toy.

07-16-05, 05:23 PM
cool, nice fix :cool:
hope it doesn't happen to anyone else :eek:

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07-16-05, 06:07 PM
The dealer (Penske) was great.
They could have closed the hood, said "no warranty" (which they did!) and booted my ass out of there.
Instead, they troubleshot to the point where everything pointed to the sensor.

They were right about it being a job to get at, and one they didn't want to do.

In retrospect I think I mentioned something about the sensors when my freind was helping me install the maggie.

I hope I get the sensor under warranty.

I am just GLAD that I didn't melt the motor!:)

07-16-05, 06:15 PM
Please post pics :hmm:

07-16-05, 07:52 PM
Glad you found the problem!!! Dealers like to do as little as they can and get paid the most. That givesme a little faith in Penske.

SEE you again SOON!

07-16-05, 08:37 PM
It is item #4 in the sketch.

1st picture is the abyss where the sensor is buried.
The view is after facia and wiper assy removal.

2nd and other pics are of the sensor (unplugged) and where the anti-knock plate was interferring with removal.

You can see material removed in red area (no I didn't cut myself!) next to allen bolt.

I think I can get it out.

07-16-05, 09:45 PM
Thankx, that's good to know.:thumbsup:

07-16-05, 09:55 PM
Guess I'd better links this thread to my favorites, just in case :nono:

07-17-05, 02:10 PM
Well I wanted a HOT ROD.

Like I said, at least I didn't melt my motor.:worship:

This is the second time a sensor (not the same one) has failed.

I thought I waited long enough when I bought my "05" but it appears it was made of "04" parts (except the drive trian?).

07-19-05, 01:31 PM
I have OIL PRESSURE!:lildevil:

What a pain in the ass (I can say that now cuz I didn't melt the motor).
Here is a picture of the little bastard, and the special sensor socket I bought to remove it (1 1/16").

If you have a maggie installed I hope you never have the same problem.


07-19-05, 01:34 PM
at least they have a tool for it that you can buy at (autozone?)