Skip the auto shop - Our mechanics make house calls

Q: Oil pressure - 2000 Jeep Grand Cherokee

asked by on

recently my oil pressure has been bottoming out and i have changed the pressure switch and oil filter and even did an oil change. nothing is helping

My car has 280000 miles.
My car has an automatic transmission.

Hello and thanks for your question. If your oil pressure gauge is showing low pressure all the time with the engine running, then the gauge may be faulty. If your oil pressure gauge is showing low at idle and when you throttle the engine up the oil pressure rises, then the problem could be either a oil pump failing or the bearings in the engine could be worn out to cause a mass internal oil leak.

Get a mechanical oil pressure gauge check tool and put it into an oil gallery port. Start the engine and check the oil pressure manually to see what the engine is producing. If the oil pressure is normal, then the gauge is failing. If the engine has low oil pressure and rises when throttled, then you probably have a pump failing or the engine needs new bearings. I recommend having a professional diagnose the oil pressure problem and let you know what repair is needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My 97 Suburban dials jump all over the place.

Hi and thanks for contacting YourMechanic. Sounds like that there is either a loose ground wire to the gauge cluster panel or the gauge cluster panel is shorting out. Look under the dash for any broken or loose wires. If...

Q: Car overheats when running A/C

Your Jeep has a mechanical cooling fan and an electric cooling fan. The electric one is hidden in the fan shroud. Its main purpose is to turn on when the A/C is on. It is a quiet fan, so you...

Q: Alarm is going off. Is there any way to reset/bypass problem?

You will have to open the hood and disconnect the battery terminals to reset the computer. Before hooking up the battery cables, the vehicle will need to be locked as it was before the alarm was tripped. Then the alarm...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.