Probably (we all hope) a sensor, but why take the chance. Good luck.
DIC says "Low Oil Pressure"
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,477
Likes: 2
From: Boca Raton, FL
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
DIC says "Low Oil Pressure"
This started yesterday---
Start the car up and the DIC says Low Oil Pressure and the oil pressure gauge sits at 0. The idiot light does not light up.
When I start the car the oil gauge goes all the way up then returns and sits at 0. Had the oil changed (royal purple) 300 miles ago. Dip stick indicates oil at proper level.
Yesterday, after a few minutes the pressure returned, today, it's sitting at 0.
Several conclusions:
1. sending unit is bad
2. oil gauge is bad
3. oil pump is bad
What to do:
drive it to my shop Horsepower Sales about 10 miles from home,
or,
have it flatbedded there?
Thanks.
Start the car up and the DIC says Low Oil Pressure and the oil pressure gauge sits at 0. The idiot light does not light up.
When I start the car the oil gauge goes all the way up then returns and sits at 0. Had the oil changed (royal purple) 300 miles ago. Dip stick indicates oil at proper level.
Yesterday, after a few minutes the pressure returned, today, it's sitting at 0.
Several conclusions:
1. sending unit is bad
2. oil gauge is bad
3. oil pump is bad
What to do:
drive it to my shop Horsepower Sales about 10 miles from home,
or,
have it flatbedded there?
Thanks.
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,955
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
This started yesterday---
Start the car up and the DIC says Low Oil Pressure and the oil pressure gauge sits at 0. The idiot light does not light up.
When I start the car the oil gauge goes all the way up then returns and sits at 0. Had the oil changed (royal purple) 300 miles ago. Dip stick indicates oil at proper level.
Yesterday, after a few minutes the pressure returned, today, it's sitting at 0.
Several conclusions:
1. sending unit is bad
2. oil gauge is bad
3. oil pump is bad
What to do:
drive it to my shop Horsepower Sales about 10 miles from home,
or,
have it flatbedded there?
Thanks.
Start the car up and the DIC says Low Oil Pressure and the oil pressure gauge sits at 0. The idiot light does not light up.
When I start the car the oil gauge goes all the way up then returns and sits at 0. Had the oil changed (royal purple) 300 miles ago. Dip stick indicates oil at proper level.
Yesterday, after a few minutes the pressure returned, today, it's sitting at 0.
Several conclusions:
1. sending unit is bad
2. oil gauge is bad
3. oil pump is bad
What to do:
drive it to my shop Horsepower Sales about 10 miles from home,
or,
have it flatbedded there?
Thanks.
I'd flat bed it.
Elmer
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,955
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
My car insurance covers tows. Why the hell would I give it a 2nd thought as to what it could possibly be? Tow it and move on.
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From: Lakewood Ranch, FL
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
There is a fourth possibility, that your oil pressure bypass (in the block) has debris in it and it is "stuck" partially open. Unfortunately, you have to disassemble past replacing the oil pump to see this (and this is almost to the point of replacing the cam).
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,477
Likes: 2
From: Boca Raton, FL
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
A couple of the guys from Horsepower Sales (Jeremy and Tim) came to the house to check this out. Their initial guess is a bad sensor. Car just left, flatbed, for their shop. They will swap one out as soon as it gets there and let me know if it was, I hope, a simple fix.
Drifting
Joined: Jul 2000
Posts: 1,861
Likes: 1
From: Bremerton WA
St. Jude Donor '09
If you've had the intake manifold off at all, I would do a simple check...
-Reach behind the intake manifold on the driverside (under the cowl)
-Locate the large vacuum hose connection on the intake manifold
(brake booster line)
-You should be able to feel the oil pressure sensor and the wires for it as the electrical connection is right there.
-Make sure the plug is properly connected and fully seated.
If not... you can see intermittent things like you've mentioned. It's a 5 minute check that can save you the time of the other options.
Here's a link to a picture... step 7 pertains:
http://www.ls2portworks.com/Installation.html
-Reach behind the intake manifold on the driverside (under the cowl)
-Locate the large vacuum hose connection on the intake manifold
(brake booster line)
-You should be able to feel the oil pressure sensor and the wires for it as the electrical connection is right there.
-Make sure the plug is properly connected and fully seated.
If not... you can see intermittent things like you've mentioned. It's a 5 minute check that can save you the time of the other options.
Here's a link to a picture... step 7 pertains:
http://www.ls2portworks.com/Installation.html
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,477
Likes: 2
From: Boca Raton, FL
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
If you've had the intake manifold off at all, I would do a simple check...
-Reach behind the intake manifold on the driverside (under the cowl)
-Locate the large vacuum hose connection on the intake manifold
(brake booster line)
-You should be able to feel the oil pressure sensor and the wires for it as the electrical connection is right there.
-Make sure the plug is properly connected and fully seated.
If not... you can see intermittent things like you've mentioned. It's a 5 minute check that can save you the time of the other options.
Here's a link to a picture... step 7 pertains:
http://www.ls2portworks.com/Installation.html
-Reach behind the intake manifold on the driverside (under the cowl)
-Locate the large vacuum hose connection on the intake manifold
(brake booster line)
-You should be able to feel the oil pressure sensor and the wires for it as the electrical connection is right there.
-Make sure the plug is properly connected and fully seated.
If not... you can see intermittent things like you've mentioned. It's a 5 minute check that can save you the time of the other options.
Here's a link to a picture... step 7 pertains:
http://www.ls2portworks.com/Installation.html
Thanks, that is exactly what they did when they were at the house. The car is now at their shop and they're going to swap out the sensor from another C6 to see if that is the issue.
Jeff
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,477
Likes: 2
From: Boca Raton, FL
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
And the finding is:
The oil pressure sensor behind the intake manifold was bad. Replaced it and oil psi immediately returned.
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,477
Likes: 2
From: Boca Raton, FL
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
