Q: Check engine light on & oil pressure dropped

asked by on June 24, 2016

The check engine light came on while I was driving to work. Also, the oil pressure gauge dropped a little. So I checked the oil level and sure enough, it was a bit low - thus I added oil. While driving home, the light stayed on and the oil pressure started to drop again. Please tell me what is the basic cause of this and what should I do?

Hello. It is possible that you are getting a false reading as a result of a faulty oil pressure switch. It is also possible that there is an oil leak and that’s what is causing the oil pressure to drop. If this is the problem, you should be able to see oil on the ground. Another possibility is that the oil pump is faulty and causing a low oil pressure condition. I would recommend that you have a certified technician, like one from YourMechanic, complete an inspection in order to pinpoint why your Check Engine Light is on as well as the cause to your oil pressure problem.

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

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

2011 Chevrolet Camaro"Driver side power seat".....Seat back won't come up. Dealer says its over $4,000.

Without knowing what the actual problem is, it would be difficult to say which estimate is accurate. It is quite a price difference. The problem can be caused by a faulty electric motor, which may be a few hundred dollars...

P0302 code & car makes puttering noises

Hello. The P0302 diagnostic trouble code indicates that a misfire has been detected on cylinder 2. Before changing the IAC valve, it would be a good idea to address the P0302 diagnostic trouble code and have the spark plugs, spark...

Engine won't idle when cold - 2001 Chevrolet Silverado

Hi there - given your repairs already, I would suspect a fuel-related issue, specifically the engine coolant temperature sensor (for engine management, not the gauge). If a faulty temperature signal is sent to engine management, the engine may not be...

Related articles

How Often Should the Steering System Be Inspected?
It’s It’s usually better to fix an automotive problem early than to wait until it causes more damage or even an accident. And that general principle applies to the steering system. Luckily, periodic inspection and maintenance of the steering system...
How Much Power Does the AC Draw From the Engine?
Most cars these days come with air conditioning as a standard feature – gone are the days...
How to Prevent Motor Oil Sludge
Regular oil changing in your car helps prevent sludge. Motor oil sludge can cause worse gas mileage, low oil pressure, and damage to engine parts.