Skip the auto shop - Our mechanics make house calls

Q: Engine vibrates when aircon is on and vibration increases specifically in traffic

asked by on

when i turn the aircon on i felt some vibration that goes on and off. vibration increases increases specially in traffic with a pounding noise and the aircon becomes a blower. air flowing out of the aircon is no longer cool even if i swicht it to maximum cool. what do you think is the problem, pls help me. thanks

My car has 21715 miles.
My car has an automatic transmission.

Hey there. The "vibration that goes on and off" is likely the compressor cycling on and off - this is by design. However, the fact that this seems to have a pounding noise with it, is most not common for Toyotas. There will be some loss of cooling efficiency in stop-and-go traffic, simply because of the loss of air flow through the AC condenser in front of the radiator, but should not completely stop cooling. Assuming it is still on warranty, take it back to Toyota, and make sure they hear/feel this noise and vibration you mention. If you are no longer under warranty or would rather have the vehicle serviced outside of the dealer, a certified technician from YourMechanic can come to your location to diagnose the AC system and have this repaired accordingly.

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!
  • Home
  • Questions
  • Engine vibrates when aircon is on and vibration increases specifically in traffic

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: My 2008 Honda Accord blows hot air and the ac make Lois humming noise

To determine the exact fault, the system will have to be tested. You can obtain that service by requesting an a/c system diagnostic. If the a/c switch was set to "on" and you attached a can of refrigerant with an...

Q: A/C problem on 06 Mitsubishi Lancer ES

If you are getting power to the compressor but the compressor clutch is not engaging then you may have a bad clutch coil. Sometimes the clutch coil will get weak and not be able to engage the clutch when it...

Q: vibration

Hello, thank you for writing in. There are several components that will cause engine vibration. With the age of the vehicle, you may want to consider taking some general maintenance steps. This would include changing the spark plugs, replacing the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...