Skip the auto shop - Our mechanics make house calls

Q: Check Engine Light is on

asked by on

The Check Engine Light is on in my car.

Since 1996, OBD-II (onboard diagnostics) has been used to identify emissions related failures in vehicles. The Check Engine Light will illuminate when the powertrain control module (PCM) has detected a problem with the vehicle that may affect emissions. There are countless reasons the light may come on. The only way to know is to retrieve the diagnostic trouble codes the PCM has stored. I recommend you have a mechanic, like one from YourMechanic, inspect the Check Engine Light and repair any problem that is directly correlated with the light.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: My van transmission started slipping and the van is making a whining sound now. I had transmission fluid filled but it is even wor

It would be a good idea to check to be sure that the fluid level was not overfilled. Too much fluid creates shifting and operational problems just as too little fluid will. So, the level should be carefully verified. If...

Q: What type of oil is best for this car if I need to change oil? I have a 5 cylinder straight 2006 Xc90.

The use of the wrong type of oil can sometimes cause codes like these, but this is rare. There my be a malfunctioning variable valve solenoid on the vehicle which can be the solenoid itself, actuator on the camshaft or...

Q: Loud squealing sound and burning rubber smell

As you know, when your car is started in cold weather in the mornings, the belts are also cold and much less pliable than when they are warm. As the engine speeds up at a much faster pace than the...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.