Parking brake fault, Cayenne

[NickGS]

Hi.
I have a Cayenne 2019 turbo s e-hybrid that is intermittently giving an electronic parking brake fault, followed by an ACC fault. Does anyone have experience with similar?

I am considering whether it may be time to renew the battery. When the engine is on, the voltage reads around and above 13 volts. Are there any devices you would recommend having to occasionally test the health of a battery?

[NickGS]

Thanks, Wookie. This was helpful.
I am driving to the Alps in a few weeks, hence why asking around for any experience with similar. The car is booked in with a Porsche dealer. Based on what you said, I will call them to gauge whether they know what to do re calibrating the hand brake motor, or I will take it to a specialist. Thanks to you I have a recommendation. I called Porsche Assistance, and the guy said the same as you, i.e., it needs to be recalibrated.

[NickGS]

In line with what you say, the fault does seem to show when the sound of the motor winding on one wheel happens to be shorter than the normal duration, say, 3s vs 5 s.

I was able to bring forward the booking; so, giving me chance to use the car a little more and identify any residual errors before the big trip.

[NickGS]

To conclude, it needed recalibration after general wear. Hence, I suspect this will be required eventually on all four wheels at various times during the life of the car. The cost was approximately £350 for one wheel.

[NickGS]

A general inspection was done on the car that also identified a rear wiper blade in need of replacing. They quoted £144. I opted to do it myself, found a Bosch part online for £9, it was posted the next day, and took me seconds to install.