Skip the auto shop - Our mechanics make house calls

Q: My oil pressure a lot lower than normal

asked by on

Hey so I was driving around and relized my oils pressure was much Lower than normal. When driving at 2000 Rpms it reads around 5/8 of the way and never goes below 3/8 even when idling. Today it was reading just below 1/2 when gunning it and below 1/4 but above 0 in idle. There is no nocking rattle or any noises at all everything seems to be normal. Oil level is fine and everything. any obvious or easy fixes that this may be? Should I even be concerned?

My car has 162000 miles.
My car has an automatic transmission.

A: More than likely, this is an oil pressure s...

More than likely, this is an oil pressure sending unit issue, rather than an engine internals issue. The most straightforward way to check this is to put a trusted pressure gauge on the oil system, preferably plugged into where the Toyota sending unit goes, and check actual pressure (psi) in your typical driving conditions cold idle and highway speed, hot idle and highway speed. Highway speed should be in excess of 50 psi, worst hot idle shouldn't go below 15-20 psi. Or you could just replace the oil pressure sending unit - that is most likely the failing component.

I would recommend having an oil pressure light inspection done by a certified technician, like one from YourMechanic, to diagnose the low pressure reading on the gauge, get an accurate assessment of any damage, and a cost estimate for repairs. YourMechanic can dispatch a mobile, professional mechanic to your location for this repair.

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: Green light doesn't come on when shifter is placed in drive

Each transmission range display has a separate bulb that lights up. The instrument cluster can be removed and the bulbs can be replaced individually. My recommendation would be to enlist the help of a mechanic, such as one from YourMechanic,...

Q: My 96 Cadillac Seville is running for about 30 mins and then my oil pressure lights comes on and says "stop engine". I've checked the oil and it's ok.

From what you've described, the problem sounds like you are loosing oil pressure to the engine and the light and noise are indicating that there is a problem. The fact that you are full of oil tells me that the...

Q: No crank no start no communication with BCM

If the Security light on your dash is on or flashing, the Passlock system is either in a confused state, or has locked you out. Pulling the Clstr/BCM fuse, then replacing it, will reset the Passlock, but may not release...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...