Related DTCS

EVAP SYSTEM DTC REFERENCE

DTCs	Monitoring Items	Reference
P043E	Reference orifice clogged (built into canister pump module)	DTC P043E, P043F: Evaporative Emission System Reference Orifice Clog Up; Evaporative Emission System Reference Orifice High Flow
P043F	Reference orifice high-flow (built into canister pump module)
P0441	Purge VSV (Vacuum Switching Valve) stuck closed Purge VSV stuck open Purge flow	DTC P0441 Evaporative Emission Control System Incorrect Purge Flow
P0450	Canister pressure sensor (built into canister pump module) voltage abnormal fluctuation	DTC P0450, P0451, P0452, P0453: Evaporative Emission Control System Pressure Sensor/Switch; Evaporative Emission Control System Pressure Sensor Range/Performance; Evaporative Emission Control System Pressure Sensor/Switch Low Input; Evaporative Emission Control System Pressure Sensor/Switch High Input
P0451	Canister pressure sensor (built into canister pump module) noise Canister pressure sensor (built into canister pump module) signal becomes fixed/flat
P0452	Canister pressure sensor (built into canister pump module) voltage low
P0453	Canister pressure sensor (built into canister pump module) voltage high
P0455	EVAP gross leak	DTC P0455, P0456: Evaporative Emission Control System Leak Detected (Gross Leak); Evaporative Emission Control System Leak Detected (Very Small Leak)
P0456	EVAP small leak
P2401	Leak detection pump stuck OFF (built into canister pump module)	DTC P2401, P2402: Evaporative Emission Leak Detection Pump Stuck OFF; Evaporative Emission Leak Detection Pump Stuck ON
P2402	Leak detection pump stuck ON (built into canister pump module)
P2419	Vent valve stuck closed (built into canister pump module)	DTC P2419, P2420: Evaporative Emission System Switching Valve Control Circuit Low; Evaporative Emission System Switching Valve Control Circuit High
P2420	Vent valve stuck open (vent) (built into canister pump module)
P2610	Soak timer (built into ECM)	DTC P2610 ECM/PCM Internal Engine Off Timer Performance

If any EVAP system DTCs are set, the malfunctioning area can be determined using Fig 1 .

Fig 1: Identifying DTC Malfunctioning Area Table

NOTE: If the reference pressure difference between the first and second checks is greater than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored.