Related DTCS

DTC No.	Monitoring Item	Refer to
P043E	Reference orifice clogged (built into canister pump module)	Refer to DTC P043E: Evaporative Emission System Reference Orifice Clog Up; DTC P043F: Evaporative Emission System Reference Orifice High Flow; DTC P2401: Evaporative Emission System Leak Detection Pump Control Circuit Low; DTC P2402: Evaporative Emission System Leak Detection Pump Control Circuit High; DTC P2419: Evaporative Emission System Switching Valve Control Circuit Low
P043F	Reference orifice high-flow (built into canister pump module)
P0441	Purge VSV (Vacuum Switching Valve) stuck closed Purge VSV stuck open Purge flow	Refer to DTC P0441: Evaporative Emission Control System Incorrect Purge Flow
P0451	Canister pressure sensor (built into canister pump module) signal noise Canister pressure sensor (built into canister pump module) signal becomes fixed/flat	Refer to DTC P0451: Evaporative Emission Control System Pressure Sensor Range / Performance; DTC P0452: Evaporative Emission Control System Pressure Sensor / Switch Low Input; DTC P0453: Evaporative Emission Control System Pressure Sensor / Switch High Input
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	Refer to DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak); DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak)
P0456	EVAP small leak
P2401	Leak detection pump stuck off (built into canister pump module)	Refer to DTC P043E: Evaporative Emission System Reference Orifice Clog Up; DTC P043F: Evaporative Emission System Reference Orifice High Flow; DTC P2401: Evaporative Emission System Leak Detection Pump Control Circuit Low; DTC P2402: Evaporative Emission System Leak Detection Pump Control Circuit High; DTC P2419: Evaporative Emission System Switching Valve Control Circuit Low
P2402	Leak detection pump stuck on (built into canister pump module)
P2419	Vent valve stuck closed (built into canister pump module)
P2420	Vent valve stuck open (vent) (built into canister pump module)	Refer to DTC P2420: Evaporative Emission System Switching Valve Control Circuit High
P2610	Soak timer (built into ECM)	Refer to DTC P2610: ECM / PCM Internal Engine Off Timer Performance

If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below.

Fig 1: Identifying EVAP System Malfunctioning Area And DTC Chart

NOTE:

If the reference pressure difference between the first and second checks is more than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P0441, P0455, P0456, P2401, P2420) will all be stored.