Tag: P1491 NISSAN

P1491 NISSAN SENTRA Secondary Switch Solenoid Circuit Malfunction

Possible causes – Vacuum cut valve bypass valve– Vacuum cut valve– Bypass hoses for clogging– EVAP control system pressure sensor and circuit– EVAP canister vent control valve– Hose between fuel tank and vacuum cut valve clogged– Hose between vacuum cut valve and EVAP canister clogged– EVAP purge port of fuel tank for clogging Tech description…

P1491 NISSAN Vacuum Cut Valve Bypass Valve

Possible causes – Vacuum cut valve bypass valve– Vacuum cut valve– Bypass hoses for clogging– EVAP control system pressure sensor and circuit– EVAP canister vent control valve– Hose between fuel tank and vacuum cut valve clogged– Hose between vacuum cut valve and EVAP canister clogged– EVAP purge port of fuel tank for clogging Tech description…