Skip the auto shop - Our mechanics make house calls

Q: Oil Pressure

asked by on

I have procured a RSX Base K20A3 (MT), Car has a P1259 (VTEC malfunction) code and will not see past 4K revs (LIMP). Changed oil to Mobil 1 5-20 as per OE specifications. (Previous owner claimed to put 20-50, for reasons unknown at the time, but now I think it's clear).Red Oil light stays on during cold start for about 3-4 seconds longer than I suspect normal, and intermittently 'flickers' between shifts or when revs go below 500. After warm-up, it's not as frequent for the light to 'flicker'. Suspected low oil pressure and proceeded to check with mech. gauge. Took off VTEC solenoid to gain access to oil pressure sensor below, uninstalled switch and installed gauge and VTEC solenoid.Upon start up, gauge climbed just over 10psi at idle. According to OE specifications that is correct. But, upon diagnosing the 3k Revs minimum (44psi), the needle barely moved if not but only to 15psi at one or two occurrences. I am suspecting a worn or bad oil pump at this point or bearings.

My car has 176000 miles.
My car has a manual transmission.

A: The oil pump may be the reason for the loss...

The oil pump may be the reason for the loss of pressure and it should be removed and checked for proper end play and excessive wear. I would recommend replacing the pump, and while the oil pan is removed, inspect the oil pan for any metal particles that could point to a problem with the bearings. When you removed the oil pan drain plug, look for metal on the plug magnet and also drain the oil through a metal strainer to see if any larger metal particles are in the oil. If you find metal in the oil or you put an oil sample on a white towel, look for metal in the oil. If any metal is found, then the oil pump may not be the only problem and the bearings in the engine are bad. If you are still having trouble, a certified professional from YourMechanic can come to your car's location to diagnose your Oil Pressure Light and recommend the best path to repair for this issue.

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

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: Car not starting

Hi. Is there any more information you can give us? For example, does the car crank at all or does it just make a clicking sound when you turn the key? Do any of the lights turn on when turning...

Q: My abs motor relay is missing. Would that prevent my car from starting

If you are sure it is the ABS relay missing, then that will not prevent your car from starting. That circuit is unique only to the brake system. If the engine does not crank over fast when starting, you...

Q: my rear right wheel is making a noise while it drives do i need new break shoes

If your wheel is installed and tightened down, your entire wheel and brake rotor should not wiggle. There should be a bit of in and out play due to the solid axle setup, but ideally it should be pretty tight....

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 to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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.