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.

A: Since 1996, OBD-II (onboard diagnostics) ha...

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

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: Will a faulty crank position sensor affect my auto trans function? 2003 Dodge Grand Caravan

Hello - No, the crankshaft position sensor will not affect your transmission at all - except when it fails, and the engine ceases to run. Check your transmission fluid for the correct level and condition (pinkish, with no burned smell)....

Q: P1810 Pressure Manifold Fault

If you have code P1810, then this might be something wrong with the transmission control valve for the gear position sensor, or a compatibility problem between the different computers. Have a pinpoint test for the code done and see if...

Q: Brand new battery but my car won't start.

Hi there, thanks for writing in. If your 2010 HHR is having problems not cranking, but you just replaced the battery, then it's highly likely that you have a broken starter or damaged electrical relay somewhere. When the vehicle shuts...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...