Related DTC

DTC No.	Monitoring items	Reference
P0441	Purge flow	DTC P0441 PURGE FLOW
P0451	Difference in pressure between canister pressure sensor (integrated into canister pump module) and air pressure sensor	ES - 343 DTC P0451 ELCM EVAPORATIVE EMISSION CONTROL SYSTEM PRESSURE SENSOR PERFORMANCE; DTC P0452 ELCM EVAPORATIVE EMISSION CONTROL SYSTEM PRESSURE SENSOR (CONTINUITY LOW); DTC P0453 ELCM EVAPORATIVE EMISSION CONTROL SYSTEM PRESSURE SENSOR (CONTINUITY HIGH)
P0452	Canister pressure sensor (integrated into canister pump module) voltage LOW
P0453	Canister pressure sensor (integrated into canister pump module) voltage HIGH
P0455	Large leak from EVAP	DTC P0455 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (GROSS LEAK); DTC P0456 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (VERY SMALL LEAK); DTC P1451 FUEL TANK PRESSURE SENSOR RANGE/PERFORMANCE; DTC P2404 EVAPORATIVE EMISSION SYSTEM LEAK DETE
P0456	Small leak from EVAP
P0458	Purge VSV voltage LOW	DTC P0458 EVAPORATIVE EMISSION SYSTEM PURGE CONTROL VALVE CIRCUIT LOW; DTC P0459 EVAPORATIVE EMISSION SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH
P0459	Purge VSV voltage HIGH
P1449	Clogged air filter (integrated into canister pump module)	DTC P1449 VENT CONTROL FILTER CLOGGING
P1451	Clogged pipe	DTC P0455 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (GROSS LEAK); DTC P0456 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (VERY SMALL LEAK); DTC P1451 FUEL TANK PRESSURE SENSOR RANGE/PERFORMANCE; DTC P2404 EVAPORATIVE EMISSION SYSTEM LEAK DETE
P2404	Flow rate rises at reference orifice (integrated into canister pump module). Flow rate reduces at reference orifice (integrated into canister pump module).
P2401	Leak detection pump stuck OFF (integrated into canister pump module)	DTC P2401 EVAPORATIVE EMISSION LEAK DETECTION PUMP STUCK OFF; DTC P2402 EVAPORATIVE EMISSION LEAK DETECTION PUMP STUCK ON; DTC P2419 EVAPORATE EMISSION SYSTEM SWITCHING VALVE CONTROL CIRCUIT LOW; DTC P2420 EVAPORATE EMISSION SYSTEM SWITCHING VALVE CONTROL
P2402	Leak detection pump stuck ON (integrated into canister pump module)
P2419	Closing of vent valve stuck (integrated into canister pump module) or not
P2420	Opening of vent valve stuck (integrated into canister pump module) or not
P2610	Soak timer (integrated into ECM)	DTC P2610 SOAK TIMER IC ERROR

When the DTCs related to the EVAP system have been stored, the malfunctioning section can be located using the table below.

Malfunctioning Areas/DTCs	P0441	P0451	P0452	P0453	P0455	P0456	P0458	P0459
Purge valve stuck open	•				•
Purge valve stuck closed	•
Purge valve low output							•
Purge valve high output								•
Canister pressure sensor signal fixed		•
Canister pressure sensor low output			•
Canister pressure sensor high output				•
Gross leak	•				•
Small leak						•

Malfunctioning Areas/DTCs	P1449	P1451	P2401	P2402	P2404	P2419	P2420
Reference orifice low-flow					•
Reference orifice high-flow					•
Leak detection pump stuck OFF			•
Leak detection pump stuck ON				•	•
Vent valve stuck closed					•	•
Vent valve stuck open					•		•
Canister filter clogged		•
Pipe clogged	•

CAUTION: If the standard pressure difference between 1st check and 2nd check is out of specification, all DTCs (P0455, P0456, P1451, P2404) related to standard pressure are stored.