Skip the auto shop - Our mechanics make house calls

Q: Intermittent Oil Pressure Light shows still, please help!

asked by on

My car has been in and out of the shop for over a month, the mechanic who is a qualified Herman mechanic and always worked on my cars is even frustrated with it, the sensors were coming up as faulty when they scanned it so they changed the sensors, we've done an oil change, replaced the filter with an Audi one, cleaned pipes and checked for blockages, checked for leaks, checked the oil pump, the oil pressure has improved from good to great and has been tested. However after a few days of driving and only when the car goes above 4000 rpm then the light comes on and once you turn off and restart the car it won't come back on until the car is over 4000rpm. It's very odd. My mechanic has borrowed and driven my car for a day and tested the oil pressure and it doesn't show any issue. I'm out of ideas!

My car has 148140 miles.
My car has an automatic transmission.

A: Hi there. Check the oil pressure with the e...

Hi there. Check the oil pressure with the engine at 4000 RPM's. If the oil pressure is normal and high, then the oil pressure sensor is failing due to engine harmonic vibrations.

If the oil pressure has dropped at 4000 RPM, then the oil galleries in the top of the block could be sludged up. Take one quart of ATF (automatic transmission fluid) and put it in the engine. Run the engine for 15 minutes. Drain out the oil and change the filter and put in new oil. The ATF will clean up all of the oil galleries and clean up the contaminants in the engine. If you need further assistance diagnosing your Oil Light issue, then seek out a professional, such as one from YourMechanic, to help you with your vehicle.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Fan assembly is not working

Hello. From what you describe it sounds like your vehicle may be experiencing more than one issue. If one of the fans is not coming on when the fan shroud is installed then that could mean that with the fan...

Q: Sluggish feel in gas pedal

Hi there, thanks for writing about your 1979 Volvo 244. First, you should confirm there is good spark at the spark plugs to eliminate ignition as a problem. Then, check fuel pressure for the correct pressure - it is likely...

Q: Power loss driving uphill

The vehicle's engine may be starving for fuel. The fuel pressure would need to be checked to see if it is within specifications, and the fuel filter and pump may need to be replaced; a mechanic will be able to...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...