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

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: Fixing a fuel leak on an O8 Dodge Caravan

First thing you want to do is you want to drive it until the gas tank is almost empty because the gas tank weighs a lot less than it does full. When it's full, it's a royal job. But, when...

Q: Rough idling, check engine light on

First have an experienced technician, like one from YourMechanic, look the vehicle over and read the fault codes from the vehicle. The trouble code may unveil a problem causing the rough idle. Otherwise make sure the maintenance has been kept...

Q: how much to replace starter ball park on BMW 2010 535xi

Hey there. This may potentially be related to what is called a starter relay (much less expensive than a starter) which directs power to the starter from the battery when you turn the key or push the start button. This...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...