|
|
DTC P1456 EVAP CONTROL SYSTEM EC-1667 [VG33ER] C D E F G H I J K L M A EC DTC P1456 EVAP CONTROL SYSTEM PFP:14710 On Board Diagnosis Logic UBS00E1J This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume DTC No. Trouble diagnosis name DTC detecting condition Possible cause P1456 Evaporative emission ● EVAP system has a very small leak. ● EVAP system does not operate prop- ● Incorrect fuel tank vacuum relief valve ● Incorrect fuel filler cap used ● Fuel filler cap remains open or fails to close. ● Foreign matter caught in fuel filler cap. ● Leak is in line between intake manifold and EVAP ● Foreign matter caught in EVAP canister vent con- ● EVAP canister or fuel tank leaks ● EVAP purge line (pipe and rubber tube) leaks ● EVAP purge line rubber tube bent ● Blocked or bent rubber tube to EVAP control sys- ● Loose or disconnected rubber tube ● EVAP canister vent control valve and the circuit ● EVAP canister purge volume control solenoid ● Fuel tank temperature sensor ● O-ring of EVAP canister vent control valve is miss- ● Water separator ● EVAP canister is saturated with water ● Fuel level sensor and the circuit ● EVAP control system pressure sensor ● Refueling control valve ● ORVR system leaks PBIB1438E |