Q: Low oil pressure light comes on when idle. Check engine light is on as well. Both came on after getting an oil change 3 days ago.

asked by on

Hello, I have a 2012 Audi A4 2.0t, my low oil pressure light came on in my car but it only come on when I'm idle. My oil is filled to the top. I got my oil changed 3 days ago. It didn't start happening until after I got my oil changed. Also my check engine light has come on. I took it to O'Reilly to get it checked. The code that came up is P2187. They said something about a positive crankcase ventilation valve. Is this related to the low oil pressure or is this a separate problem? What vould ve causing the low oil pressure if i just got the oil changed and my oil is filled to the top. Also what could happen if I keep driving the car?

My car has 55734 miles.
My car has an automatic transmission.

It is possible that they put in the wrong viscosity oil. In rare instances, a defective filter will also cause low pressure. If there is too much oil, it will aerate and cause low pressure. Be sure the oil level is really not above "max". The P2187 code will appear if the oil fill cap is not tight but it will also appear due to a myriad of causes because that code only "generally" identifies a lean running condition. Consequently, numerous parts would have to be tested including the O2 sensor, gas cap seal, manifold air leaks, any vacuum leak anywhere including PCV and EVAP systems, exhaust leaks, and fuel system faults such as failing fuel pump, clogged filter and more. Since the car has relatively low mileage, you would not expect a failed oil pump, although the pressure sensor (or switch) could be bad. However, the occurrence of the oil pressure warning light is quite coincidental to the oil change, thus I would suggest bringing the car back and asking them to redo with a new filter and double check the viscosity of the new oil that they use. If the problem persists after that, you will have to test actual operating oil pressure (at idle for instance) as well as the oil pressure switch. Finally, if the oil pressure warning light comes on continuously, unless the warning circuit itself is malfunctioning, that means the oil pressure is too low to operate the engine without damaging it. Anytime the light comes on for more than literally an instant, you should shut down the car and thus an issue like this obviously has to be repaired.

If you’d like, a YourMechanic certified mechanic can come to your home or place of business to inspect the vehicle and perform an oil pressure light is on inspection to diagnose the vehicle and suggest potential repairs.

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
  1. Home
  2. Questions
  3. Low oil pressure light comes on when idle. Check engine light is on as well. Both came on after getting an oil change 3 days ago.

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: Battery replacement at dealer or regular auto store?

Hi There, I would recommend having a qualified mechanic from YourMechanic come to your location to replace your battery for you saving you time and money.

Q: Alternator Fault

You will need to check the one way clutch pulley on the alternator to see if it operates as it should. First remove the belt. Then using a plastic or non conductive blade and put it in the alternator rotor...

Q: ok, so my Kwik Kar oil change place told me the oil pan needs to be replaced because the drain plug is stripped. So they put a la

Hi Eric. Sorry to hear this happened to you. Oil pan's bolts don't typically "just strip". It's typically always due to either over tightening, or cross threading. The problem is trying to prove whether it occurred with the previous oil...

Related articles

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 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...
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.