: Oil pressure max out when I turn the key once



mannyfire
12-28-10, 10:05 AM
My oil pressure goes through the roof before I even turn the car all the way on. I was driving down the road Christmas eve and I got a "service engine soon" on my screen. Then about a couple seconds later the "high oil pressure" started ringing. I checked the gauge an it was max to the fullest. I immediately pulled over and checked my oil level but it was fine. I'm thinking it a sensor problem but not sure. Has anyone encountered these type of problems before?

darkman
12-28-10, 10:43 AM
Assuming there is not some major problem, the other causes include: bad ground, bad oil pressure sender, or bad oil pressure relief valve. See attached.

BirdmanTamu
12-28-10, 04:01 PM
Yes, oil pressure sender is a common issue. Still need to get around to replacing mine.

D3l7a3ch0
12-29-10, 12:42 AM
are you sure you have the right oil filter? who did your last oil change? do u have 5W30 synthetic oil?

mannyfire
12-29-10, 05:15 AM
I Put 5 liters if royal purple 10w 30. And I also put in a Lucas injector cleaner in my gas tank. But that's the only lubrication I've done recently to my car. I did it about 3 weeks ago.

mannyfire
12-29-10, 05:20 AM
How would I find out if it's the sender. I plugged it into my code readerand nothing popped up. I also notice when I pass about 3000 rpm the oil pressure goes all the way down, and the " low oil pressure, turn off engine" light comes on.

D3l7a3ch0
12-29-10, 07:41 AM
the other oil pressure sender thread mentioned there is no code for oil pressure sender. it's stickied, like the third one down

also, I was just looking in the manual and it says you should use 5W30. *what* the consequences are exactly, I don't know.

with filter change it's 5.5 QTs. did you change the filter, or did you leave it in and use 5QTs of oil instead of 5.5QT because of the filter already being full?


when I pass about 3000 rpm the oil pressure goes all the way down, and the " low oil pressure, turn off engine" light comes on.

I could be wrong, but maybe the thicker oil is popping the pressure relief open after 3k

rand49er
12-29-10, 10:26 AM
Mine reads 129 psi ... for the last 2-1/2 years ... got a new sender unit sitting on passenger seat ... :banghead:

D3l7a3ch0
12-29-10, 03:14 PM
yah I don't want to be the reason someone dismisses a warning... that's on them!

BirdmanTamu
12-29-10, 04:32 PM
with filter change it's 5.5 QTs. did you change the filter, or did you leave it in and use 5QTs of oil instead of 5.5QT because of the filter already being full?


If you're suggesting his oil level is low, it's interesting to note our vehicles are equipped with two level indicators. One electronic, one manual. The electronic one (if properly working) lets you know if the level is too low/high.



I could be wrong, but maybe the thicker oil is popping the pressure relief open after 3k


You're wrong.

darkman
12-29-10, 04:47 PM
How would I find out if it's the sender. I plugged it into my code readerand nothing popped up. I also notice when I pass about 3000 rpm the oil pressure goes all the way down, and the " low oil pressure, turn off engine" light comes on.

Well assuming you do not want to pay someone to diagnose the problem the alternative is usually to change out the inexpensive parts until you get the right one. Checking the grounds is free. Replacing the sender is about $40. The oil filter is also pretty cheap, but I have not found the price of the oil pressure relief valve, which may be a dealer item.