Fuel Tank Ventilation System - Above Limit

P0441

93 Fuel Tank Ventilation System - Above Limit

Diagnosis conditions
- Engine idling
- Vehicle speed = 0 km/h
- Oxygen sensing system active
- No secondary air diagnosis
- No other faults in memory

Possible fault cause
- EVAP canister purge valve incorrectly installed
- EVAP canister purge valve faulty
- Blocked purge air line
- EVAP canister purge valve leaking
- Leaking line between EVAP canister and air intake system

Affected terminals
- (none)

Diagnosis/Troubleshooting

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.

Work Instruction 1 - 5: