Q: Oil pressure gauge

asked by on December 11, 2016

The oil gauge dropped while driving No oil put some in it Let it sat for a while and gauge went back up Does it seem as if I have a blown head gasket

My car has 123452 miles.
My car has an automatic transmission.

Your oil pressure gauge works by using a sending unit that is mounted down on the engine block that reads the oil pressure inside the motor when the engine is running. As the engine RPM’s go up, more crankcase pressure is created and thus, the oil pressure rises. When the oil level in the engine is low, this causes a drop in oil pressure due to the lack of oil volume in the motor. This is a very dangerous situation to be in and will cause major engine damage when the oil is low. The reason your oil pressure gauge dropped is due to one of a couple of reasons. Either the motor is in fact low on oil or the oil pressure sending unit is not working properly and may be producing a faulty reading. I would recommend first, to check the actual oil level in the motor by using the dipstick. Be sure the oil level reaches the "full" mark. If this registers as "full" then you likely have a faulty oil pressure sending unit. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle to determine what may be causing your low oil pressure light to come on.

Was this answer helpful?
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

Replaced the power steering pump and now car won't start.

Hello there, you have a few different faults going on with your 2009 Chevrolet Impala. The power steering repair should not effect the vehicle starting in any way. There are many common causes for the vehicle to not start such...

Where is OnStar module located

Hello. The OnStar module is located in the center console, behind the HVAC controls. The interior will have to be disassembled in order to access the module.

What does the Forward Collision Alert Off message mean?

The Forward Collision Alert Off message can appear on your driver information center (DIC). The DIC displays this alert when the Forward Collision Alert (FCA) system is temporarily not working. When the FCA system is resolved, the alert will go...

Related articles

The Top 5 Selling Cars in Georgia in 2012
Georgia Georgia offers drivers a mild climate with very little snow, but rain is a major factor. Previous best-selling cars in the area, such as the Escape, Fusion and Camry, have shown that residents prefer a mix of both SUV...
5 Warning Lights You Should Never Ignore
Car warning lights tell you something in your car needs attention. If you see the Check Engine Light or other warnings, get it inspected right away.
The Best Used Cars to Buy If You’re an Athletic Coach
If If you are an athletic coach, you need a used vehicle with tons of room to transport gear. Once in awhile, you may have to take a player or two along with you as well. What this means is...