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.

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

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: Oil and suspension

Hi there. From the description you have provided, I am concerned about the diagnosis you have received, being your vehicle has only 52,000 miles. Another inspection is recommended. With oil leaks, sometimes, steam cleaning the engine first would help identify...

Q: oil pressure on 80 what can be the problem?

The best scenario is if the oil pressure sending unit is simply bad. The sending unit can be tested and/or you can simply tee in a known good gauge to rule the sending unit in or out as the cause....

Q: Sounds as if the car is not going into gear. I have RPM reading odometer, not sure what it should be reading when driving on freeway.

Hello and thank you for contacting YourMechanic. Watch the tachometer (rpm gauge) as the vehicle is in motion. When driving, you should see the tachometer go up and then go down a little when the transmission shifts gears. For 4...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...