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.

A: The oil pressure should never read "0....

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・Save up to 30%

Get a quote

What others are asking

Q: Can a error saying Manifold Absolute Pressure/ Barometric Pressure Circuit Malfunction be caused by a almost dead battery?

Hello. The low battery should not cause problem with the MAP sensor but will cause the computer to have different issues. It could cause the charging system to overcharge. You need to verify that the intake does not have any...

Q: Could i have caused an engine modulation?

We have all at one time or another crossed spark plug wires. To date, it has not caused a problem other than the misfire from the crossed wires. So rest assured, it is highly unlikely that this caused any lasting...

Q: cylinder misfire

There seems to be a variety of symptoms going on at the same time. Addressing the ticking issue, it could be your lifters, and it could also be your fuel injectors. This could be part of the problem when it...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.