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Home >> Volvo >> 2002 >> S80 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 7 Of 11 >> ECM-431D: Leak Diagnostic Unit. Signal Too High (B6294S2; B6294T; 2002) >> Signal too high >> Leakage >> Checking the EVAP canister purge valve

Checking the EVAP canister purge valve

HINT: Leakage through the EVAP canister purge valve can be checked by blocking the hose between the EVAP canister and the purge valve and then running the quick test of the fuel tank system. If leakage was detected in a previous quick test of the fuel tank system but is not now detected when the hose between the EVAP canister and the purge valve is blocked, the leakage may be through the EVAP canister purge valve. 

Carry out the quick test of the fuel tank system