Skip the auto shop - Our mechanics make house calls

Q: Engine warning light on

asked by on

My engine warning light came on a couple minutes ago. The car is vibrating more than usual even when idle. No other noticeable problems.

Car is well maintained and hasn't been in any accidents

My car has 74000 miles.
My car has an automatic transmission.

A: Your check engine light may come on for man...

Your check engine light may come on for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter, bad spark plugs or wires and many other reasons. Any of these types of things can cause the car to vibrate a bit due to a rough idle. Unfortunately due to the wide range of possibilities for the check engine light to come on, the best way to narrow down the scope of what may be causing this is to have the vehicle hooked up to a scanning tool to download any potential fault codes that may have registered in the computer. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle to determine what may be causing your check engine light to come on.

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・Save up to 30%

Get a quote

What others are asking

Q: Check Engine Light is on - codes P0016 and P0017

Hi there. These codes lead me to believe that the cam/crank timing is out. However, there are possible underlying problems that can set the same codes and give you the symptoms you're describing. You could have a wiring/connector issue...

Q: 2010 Toyota Prius. When I made a sharp turn, all check engine and warning lights to check 'Hybrid System' came on.

In order to reset the Maintenance Schedule light: 1) Without touching Brake pedal, press "Start" button twice, 2) Press and hold the "STRIP" button until you see "TRIP A" on display, 3) Turn Ignition to "OFF", 4) Press...

Q: Engine not getting any fuel

Hi there. Your vehicle's fuel pump needs to prime/whine when the ignition is turned into the on position. If you do not hear this humming noise it can mean you have a faulty fuel relay or fuel pump itself. Another...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...