Q: Why does my car shake when I turn the a/c on?

asked by on

Car shake when ac is turn on, the car stopped working when coming to a red light

My car has 94000 miles.
My car has an automatic transmission.

Hi there. Shaking with the A/C on can be caused by a number of reasons. The a/c compressor puts a lot of strain on the engine because the compressor is similar to being a small engine itself. When the a/c is switched on, the engine control unit should trigger components such as the idle speed/air control motor, to increase the idle slightly to compensate for the extra drag of the compressor. If that does not happen, then the additional drag can cause a low,shaky idle and even cause the engine to stall. Stalling can happen more often with the a/c on and turning the steering wheel as the power steering pump also creates drag on the engine. Excessive shaking can also be attributed to weak/broken motor mounts as well. It’s probably a good idea to have a professional mechanic complete a vehicle shaking inspection to determine why you are having these problems.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Why does my car shake when I turn the a/c on?

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: When I lightly press my brake pedal I hear a knocking and my steering wheel shakes a little but if I press the brake pedal harder

Hi Roger. Thanks for submitting your question today. Quite often, what you are indicating is caused by a warped brake rotor, a failing master cylinder or misaligned brake pads. Vehicles with ABS can also experience this issue when there are...

Q: Rear brake clicking noise after putting on a set of shoes and drums.

Hi there. Check the hardware to the shoes and see if the springs are sprung. A loose brake return spring will cause a clicking sound as its touching the drum when the brakes are applied. If the springs are the...

Q: Q: Truck not starting.

Your transfer case may have an internal issue or a shift linkage issue may be the cause. I recommend you have a qualified technician check to see if the transfer case is defective or you have just a linkage issue....

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...