Check EVAP canister purge valve for leaks

NOTE: Before detaching the ventilation lines from the EVAP canister, clean the area around the connections. Dirt must not be allowed to get into the connectors.

Detach the ventilation line to the EVAP canister purge valve from the EVAP canister (protective cap).
With special tool 9160/1, generate a vacuum of 200 mbar (0.2 bar).

Fig 1: Checking EVAP Canister Purge Valve For Leaks
Courtesy of PORSCHE OF NORTH AMERICA, INC.

If no vacuum can be built up, replace the EVAP canister purge valve.