Skip the auto shop - Our mechanics make house calls

Q: When I turn on the AC, the malfunction light comes on and the car doesn't accelerate well and starts jerking.

asked by on

When I switch on the Air Conditioning after a while the engine malfunction light comes on and the car doesn't accelerate properly.sometimes even jerking...when I switch off the AC the car works fine but malfunction light is still illuminated.

My car has 10800 miles.
My car has an automatic transmission.

A: The trouble code stored in the vehicles com...

The trouble code stored in the vehicles computer may shed some light on what’s going on. Turning on the AC adds an extra load to the engine and the computer picked up some trouble when the data figures changed. Consider hiring an experienced technician with a professional scan tool like one from YourMechanic who can come out, read the check engine light codes and observe the vehicle data to offer a more personal diagnosis.

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: Engine is running rough and P0401, P0171 and P0174 codes.

The first thing to check is to see if the EGR solenoid will release the vacuum when the electrical connector is disconnected. If it still doesn't release the vacuum then the solenoid should be replaced. The codes need to be...

Q: Performance not the same anymore

Hi, thanks for writing in. This may be related to many things. I would start with having the engine codes downloaded (these register when the check engine light coms on). If you would like help, consider having an expert automotive...

Q: My car has an oil leak, and might need a new timing belt and new water pump

Yes, it is definitely recommended that you replace the timing belt at the service interval or it may break at an inconvenient time. Since the water pump is driven by the timing belt, it's often recommended changing the water pump...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...