Related DTCS

DTC REFERENCE

DTCs	Monitoring Items	See Procedure
P043E	0.02 inch orifice clogged (built into pump module)	DTC P043E Evaporative Emission System Reference Orifice Clog Up: DTC P043F Evaporative Emission System Reference Orifice High Flow
P043F	0.02 inch orifice high-flow (built into 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	Pressure sensor (built into pump module) voltage abnormal fluctuation	DTC P0450 Evaporative Emission Control System Pressure Sensor / Switch: 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
P0451	Pressure sensor (built into pump module) noising Pressure sensor stuck (built into pump module)
P0452	Pressure sensor (built into pump module) voltage low
P0453	Pressure sensor (built into pump module) voltage high
P0455	EVAP gross leak	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	Vacuum pump stuck OFF (built into pump module)	DTC P2401 Evaporative Emission System Leak Detection Pump Control Circuit Low; DTC P2402 Evaporative Emission System Leak Detection Pump Control Circuit High
P2402	Vacuum pump stuck ON (built into pump module)
P2419	Vent valve stuck closed (built into pump module)	DTC P2419 Evaporative Emission System Switching Valve Control Circuit Low; DTC P2420 Evaporative Emission System Switching Valve Control Circuit High
P2420	Vent valve stuck open (vent) (built into pump module)
P2610	Soak timer (built into ECM)	DTC P2610 ECM / PCM Internal Engine Off Timer Performance

If any EVAP system DTC's are set, the malfunctioning area can be determined using the table below.

Fig 1: EVAP System Malfunctioning Reference Table

NOTE: If the 0.02 inch reference pressure difference between the first and second checks is greater than the specification, the DTCs corresponding to the reference pressure (P043E, P043F, P0441, P0455, P0456, P2401, P2420) will be all stored.