Skip the auto shop - Our mechanics make house calls

Q: My car has low oil pressure. I've already changed the oil pressure sensor 3 times.

asked by on

okay problem is the oil pressure keeps dropping oil pressure but there's times where it drives fine with no drop in pressure and u hear no knocking. But then all of a sudden about when you gonna slow down or take it foot off the gas it drop below 40 and go all way down to 0 but if u give it gas the pressure goes backup. Then there are times when it runs fine no drop in pressure no knocking sound. I have replaced the oil pressure sensor three times. It hasn't fixed the problem. Please help

My car has 213182 miles.
My car has an automatic transmission.

A: If you have replaced the sensor three times...

If you have replaced the sensor three times and it did not fix the problem, then you may have problems with the oil pressure being low at idle due to wear in the engine bearings. The reason it would be fine sometimes and not others may be due to engine load and temperature changes. Have the oil pressure tested at the sensor port to see if it is low and needs engine repairs.

I recommend having a certified mechanic, such as one from YourMechanic, come to your location to perform an inspection to determine why the Oil Pressure Light is on.

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: Engine shake when started and oil pressure gauge dropped to zero.

Hi there - nice ride! I would first get the oil level back up to "Full". hopefully this was less than a quart low. I would also get a real gauge on the oil pressure to know precisely what oil...

Q: Service Engine Light is on.

Different than the Check Engine Light, the Service Engine Light is typically triggered when a predetermined service interval has been reached. There are dozens of service schedules that could be coming up including oil, transmission, battery, ignition system (spark plugs)...

Q: Slight knocking while driving

If your car has been leaking oil for an extended period and you hear knocking, it's possible that an engine bearing has either spun, or is about to spin in its bore. After fixing the oil leak, I would recommend...

Related articles

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...