Skip the auto shop - Our mechanics make house calls

Q: When disabling cruise control, SUV kept accelerating to 115 mph

asked by on

While driving at 75 mph, I was using cruise control. When I was switching lanes and trying to disable the cruise control using the brake pedal, my SUV started accelerating. The speed kept increasing to 115 mph. I put both of my feet on the brake pedal trying to slow down for around 10 minutes while weaving in and out of the interstate traffic. It was a terrifying experience! The SUV finally and suddenly stopped accelerating and slowed down. What caused this and what is your advice for what will fix this problem?

From your description it sounds like the throttle body became stuck. Since this vehicle does not have a throttle cable it is possible that a sensor malfunctioned and caused the throttle to stay on. These vehicles have been known to break the gears inside the throttle body and cause the symptoms you described. It is possible that the throttle body may need to be cleaned or replaced. Also, in the future, if the throttle sticks the best course of action is to simply turn the ignition off. Don’t turn it all the way back because that would lock the steering wheel. Only turn it back one position to the accessory position.

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 dying and not getting any gas since new fuel filter

First try and open the gas cap to relieve any vacuum in the fuel system. Make sure you are not out of fuel. Double check the fuel relay is seated properly. If your Check Engine Light is on, then have...

Q: Terrible squealing upon cold start and for a few minutes while driving afterward.

Hello. The noise you are hearing is that new serpentine belt sliding and skipping on the pulleys they are driving. This is typically caused by the belt being loose, or a pulley refusing to turn freely. Your vehicle is equipped...

Q: How do you cancel cruise control?

Cruise control is definitely convenient, but it’s not something that can be used all the time. You’ll definitely need to cancel it at some point – generally at the first sign of brake lights ahead of you on the road....

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...
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...
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...