Q: Cruise control turned on, sudden acceleration, high revving

asked by on

My car has 74,000 miles on it. Recently, I was driving uphill at speed around 56 mph, when the cruise control was activated and the car started accelerating suddenly by itself. At that point, the engine was revving high and the RPM jumped to over 4000. I started to brake and the cruise control turned off. There was a vibration in the steering wheel as well. Also, upon applying the emergency brake, it suddenly went to the floor and was completely unresonsive. I managed to bring the car to a halt. The dealer couldn't find the problem and said the car requires further inspection. Do you have any idea what happened to my car?

Hey there. This could be from a defective cruise control switch shorted or a problem with the throttle control actuator. The vehicle should be towed to the dealer and left there until they verify and repair the problem. The dealer will not repair something unless they can duplicate the problem. Without duplicating the issue it cannot be diagnosed. Check to make sure your floor covers are secure away from the pedal. If you would like to have an outside expert give the car a second opinion, a qualified professional from YourMechanic can come to your car’s location to inspect the acceleration, cruise control, and vibration issues.

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. Cruise control turned on, sudden acceleration, high revving

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: Oil leaked heavily out of my car while driving home while making a revved up noise.

Hi there. Check the engine for any oil leaks that are visible to you. Check the front seal, the oil pan, the oil filter, the oil drain plug (make sure its tight), the valve cover gaskets, the oil cooler lines,...

Q: Popping noise when accelerating

Hi. The noise will have to be inspected to initiate a diagnosis of what the problem might be. If the noise only occurs when the body of the vehicle shifts its weight, then it is either the suspension, body mount,...

Q: Check engine light on and recurring P0455

Hi there. The P0455 code that you are getting in the computer is a different issue than the transmission. Most of the time it is caused by a bad gas cap or a leak in the system. If the gas...

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...
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...
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...