Diagnosis Conditions

Fig 1: DTC P0446 Diagnosis Conditions

Courtesy of PORSCHE OF NORTH AMERICA, INC.

NOTE: Fuel tank ventilation diagnosis is initiated with the Porsche System Tester 2 in the "Short Test" menu. This reduces the time elapsed after engine start-up to 30 seconds.

Fig 2: DTC P0446 Fault Conditions

Courtesy of PORSCHE OF NORTH AMERICA, INC.

NOTE: The EVAP canister purge valve is very sensitive to contamination. If the lines to the EVAP canister have to be detached, the outside of the canister must be cleaned beforehand .