PCM shuts off every 3 mins after update - Porsche Cayenne Forums : Porsche Cayenne Forum
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post #1 of 2 Old 05-25-2020, 11:54 AM Thread Starter
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Join Date: May 2018
Location: Massachusetts South Coast
Posts: 7
PCM shuts off every 3 mins after update

I brought my '14 Diesel for an oil change to Prime Porsche Westwood, MA. They tell me it's due for a software update that they would do it too. On my way home, the radio shut off once. Then, I noticed it happened a few days later. Now it shuts off every three minutes and comes on even when the car is off.

Anyone experience the same thing?
tmlima is offline  
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post #2 of 2 Old 05-29-2020, 10:10 PM
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Join Date: Dec 2019
Posts: 3
We are aware that some of our customers are experiencing an issue with their vehicle’s central communication unit, known as the Porsche Communication Management (PCM), causing it to continuously reboot.
If your vehicle is equipped with PCM and you are experiencing this condition, performing a hard reset of the PCM should resolve the concern. To perform this reset please follow these steps:
***Before performing this procedure, ensure that your vehicle is located outdoors. Please note that hard resetting the PCM will remove all personalized settings
Press and hold the INFO button for approximately 10 seconds until the PCM reboots.
Press the CAR button.
Press the OPTION button or touch the tab of the same name in the header.
Select "SET PCM system">>"Reset PCM".
Select "Vehicle handover" This resets all settings to predefined values and deletes your personal settings and data (including addresses, destinations, radio stations, phone numbers, as well as the recordings in the Sport display).
Confirm the relevant prompt by selecting "Yes".
If after performing this procedure your vehicle continues to experience consistent reboots please contact your local authorized dealership to schedule an appointment for further diagnosis.
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