Skip the auto shop - Our mechanics make house calls

Q: Check engine light flashing motor shake could tensioner making water pump or anything else belt driven be it

asked by on

Runs good tell turn on AC to highest setting then check engine light flashes and motor shake noticed the tensioner was loser then I thank it should be other then that everything looks ok does over heat when setting but one fan is out I know that
My car has an automatic transmission.

A: The flashing Check Engine Light means the e...

The flashing Check Engine Light means the engine is misfiring, which can be very harmful to your catalytic converter. If it starts doing this when the A/C is turned on, then there could be a problem with the ignition system being unable to handle the increased load placed on the engine at idle. This could be as simple as worn spark plugs or a weak ignition coil, but it could be more serious like low fuel pressure or low compression in one cylinder.

The overheating is also a problem, but most likely a separate one entirely. I would strongly recommend having the ignition system checked by a qualified professional, as well as having the overheating issue diagnosed as well. Consider YourMechanic if you decide to get this fixed, as a certified technician can come to you and perform these checks on your vehicle.

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・Save up to 30%

Get a quote

What others are asking

Q: Car not starting and AC making a loud sound

The battery should be fully charged and then load tested to see if it is indeed faulty. The AC compressor needs to be checked for normal operation, also a set of AC gauges placed on the system and a performance...

Q: My car won't start, neither does my auto. Start. Sometime it might start if I jump it sometimes it won't.

Hi there. There are a number of issues that will make a car hard to start. Everything from the electrical system to the fuel system to the actual starter itself can be the problem. Finding the root cause of a...

Q: My check engine light turned on and it also notified me that the traction control turned off

I do not recommend driving the vehicle until the car is diagnosed as to why the lights came on. The issue may constitute your vehicle to be unsafe to drive and should only be driven only to get to a...

Related articles

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...
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...
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.