Skip the auto shop - Our mechanics make house calls

Q: Car independently accelerates - 2013 Porsche Panamera

asked by on

My car independently and unexpectedly accelerates. It is intermittent and has occurred approximately four times. I have been to a dealer, but they could not find any problems with my car. My car now has 32,000 miles. Each time this occurred, I immediately hit the brake pedal in order to avoid an accident. This is only happening at low speeds or when the engine is idling and I have my foot off the brake. In your expertise, what is causing this and how can I get it fixed?

Make sure to stay in touch with Porsche on this issue. It is possible the Idle Air Control valve, which "adjusts" engine idle speed, is faulty, or is receiving an incorrect signal to raise the engine RPM (say for air conditioning load). The result would be an increase in engine speed. If you would like a certified technician from YourMechanic can come to your home or office, diagnose the issue and replace the Idle Air Control valve.

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!
  1. Home
  2. Questions
  3. Car independently accelerates - 2013 Porsche Panamera

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: Considering purchasing, however, I am leery of possible high maintenance costs associated with this vehicle. Dependable? High maintenance?

Going from a BMW 135i to a 2014 Porsche Cayenne will obviously cost more in maintenance through the years. From special procedures during repairs, more expensive parts and higher labor costs, you can only expect the upkeep costs to go...

Q: Clanking while pressing gas, making a turn and accelerating

The problem sounds like your transmission broke a forward over-running clutch inside the transmission. I would recommend having a mechanic inspect to determine if the noise is from the transmission or the engine, since both the engine or transmission can...

Q: Engine makes tapping sound

The design of this engine often leads to sludge build up, even when regular maintenance is performed. This can cause oil restriction. The hydraulic lifters inside the engine are oil dependent, and will not "pump up" without proper oil supply....

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...
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...