Skip the auto shop - Our mechanics make house calls

Q: Revving out of control

asked by on

My car has 7500 on it. I was coming to a stop, and the engine revved like it was out of control. The car wanted to keep moving! I slammed on the brakes to stop it. I put the car in park and turned it off. I turned it on again in park and the engine revved up again. I turned it off again. I waited until traffic cleared and turned the car back on. It seemed OK, but I had it towed to the dealer. The computer scan showed no problem, but I am afraid to drive it. What do you recommend?

It sounds like you may have an issue with your idle air control valve on your 2011 BMW 328i. The idle air control valve is responsible for keeping the RPMs within a certain range during idling at a stop. If the idle air control valve is malfunctioning, this can cause the RPMs to rise. When the RPMs rise while the vehicle is in gear, the vehicle will lunge forward causing the symptoms you are experiencing. The idle air control valve usually will not throw a code when it fails. I would recommend having your idle air control valve tested and replaced as necessary.

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: I have a 2009 328i. Gear shifter is stuck in park position. Brake switch bad ?

Hi there. There are a number of reasons why a car will not move from park to drive. They can range from the shifter being locked to a broken shifter cable. If the brake lights work, it's less likely that...

Q: New car that is always lighting up ‘check engine’

Hello, thanks for writing in about this issue. No, your car is not a lemon! The Check Engine Light (CEL) is trigged by the engine control unit when it detects a fault with any engine sensor or a...

Q: How do I reset the limp home mode?

The limp home mode helps protect your transmission if damage is detected. Limp home mode limits the transmission to only second gear, which keeps your vehicle safer, while also giving you enough power to get to a dealer. If you...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...