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P1476 Diagnostic Trouble Code Discussion for October 2020

High Fan Relay Control Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1476
Help Request Posted
2015 Porsche Cayenne Turbo 4.8L MIL Lamp on VIN: WP1AC2A25F
P1476: Insufficent vacuum for leak detection pump. we have a new fuel cap, new leak detection pump and a new vacuum pump, 25 inches of vacuum going into pump, smoke tested and see no leaks, erased codes and test drove car and both codes come back, what are we missing ?
October 26, 2020