The manual provides troubleshooting and repair procedures for the “Coolant Temperature Too High” warning message on Porsche Panamera (971) models from 2017 and onwards.
Check the coolant pump and change-over valve:
Internal tests have shown that a faulty change-over valve in the coolant pump can cause the warning message. The manual provides step-by-step instructions for checking and replacing the change-over valve and the coolant pump if necessary.
Preparatory Work:
Before starting the repair, the air guide, belt pulley, and coolant pump should be removed.
Checking Change-Over Valve:
The manual provides detailed procedures for checking and replacing the change-over valve, including steps for disconnecting the vacuum hose, building up vacuum, and performing a drive link test.
Manual:
Download: Porsche Service Technical Information 1 173/21ENU Service for Coolant Temperature Too High
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