Skip the auto shop - Our mechanics make house calls

Q: Oil pressure

asked by on

When i first start the car my pressure guage reads 0. If i drive for about 10 minutes it starts to read pressure. As long as i am moving i will read pressure. When i stop at a light oil pressure goes back to zero and then back up when i move again.

What could cause this to happen?

My car has 140000 miles.
My car has an automatic transmission.

The oil pressure should never read "0." It will be very low, usually around 15-20 psi, but should never be "0." There are a number of factors to consider in terms of oil pressure such as the viscosity of the oil, the type of oil filter, engine rpm’s at idle and the engine temperature. When the engine is under load and as the rpm’s increase, the oil pressure should be up around 45-60 psi. If it is in fact "0," this may be cause for alarm and may suggest you do not have any oil in the motor or potentially a faulty oil pressure sensor. I would recommend having an expert from YourMechanic come to your location to diagnose your oil pressure switch.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Truck spun and hit the curb, now the rear wheel wobbles

Hey there. You will need to have the rear rim inspected along with the rear axle to see if one or both are bent. I have also seen where the rear axle housing gets bent if the curb was hit...

Q: Questing about shifting from 4wd to 2wd.

Hi there. When shifting out of 4WD, it is best to stop the vehicle and back up about 10 feet. This will fully disengage the transfer case and put the vehicle into 2WD mode. It is normal for the transfer...

Q: My gear when in park doesn't allow ME ro take my key out I have to push up real hard to take out the key..

Hello, thank you for writing in. We need to determine if the key is getting stuck in the ignition cylinder, or if the shifter is not registering as being in park. First, make sure nothing is stuck in the way...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.