Q: My Porsche Cayenne is losing power when i drive. The car vibrates then suddenly the Steering gets locked and I cant accelerate.

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My Porsche Cayenne is losing power when i drive. The car vibrates then suddenly the Steering gets locked and I cant accelerate, then i have to turn it off to restart the car.

My car has 87000 miles.
My car has an automatic transmission.

Hi Umarr. Thanks for writing in to YourMechanic.com today. From what we can gather from your information, it’s apparent you have a rather serious safety issue going on with your Porsche. It’s possible that the root source is a damaged or faulty throttle controller. In some cases a damaged throttle controller will cause the engine to have issues with acceleration or cause a "stumbling" effect when the throttle is engaged by the driver. This can result in lack of performance and can be a safety concern if not inspected and repaired quickly. Not having full access to the throttle can lead to accidents and in the worst case, a stuck throttle. However, this would not explain the steering wheel locking. That - to be honest is the baffling part of this question. I think it’s best to have a professional mechanic complete an inspection to determine what is causing this problem.

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