Affected terminals
Terminal IV/30
Diagnosis/troubleshooting
On Board Diagnostic
P0448
EVAP Canister Shutoff Valve (Output Stage) - Above/Below Limit
Function
The task of the shutoff valve is to seal the purge air line to the EVAP canister during the fuel tank leak test.
Diagnosis conditions
- Engine running
- Battery voltage greater than 7 V
- Fuel tank ventilation active
P0447 - P0448
NOTE: Fuel tank ventilation can be activated with the Porsche System Tester 2 in the Short test menu.