Evaporative Emissions DTCS

PCM DIAGNOSTICS TROUBLE CODE (DTC) LIST

DTC	Description	Source	Perform Test
P0442	Small leak detected in EVAP system (as small as 1.02 mm [0.040 inch]).	PCM	Go To PINPOINT TEST A: DTC P0442 SMALL LEAK IN EVAP SYSTEM, DTC P0456 VERY SMALL LEAK IN EVAP SYSTEM, DTC P0457 CHECK FOR MISSING OR LEAKING FUEL FILLER CAP .
P0455	Major leak or no flow detected.	PCM	Go To PINPOINT TEST B: DTC P0455 MAJOR LEAK OR NO FLOW DETECTED OR DTC P1443 VERY SMALL OR NO PURGE FLOW DETECTED IN SYSTEM .
P0456	Very small leak detected in EVAP system (as small as 0.051 mm [0.020 inch]).	PCM	Go To PINPOINT TEST A: DTC P0442 SMALL LEAK IN EVAP SYSTEM, DTC P0456 VERY SMALL LEAK IN EVAP SYSTEM, DTC P0457 CHECK FOR MISSING OR LEAKING FUEL FILLER CAP .
P0457	Check for missing or leaking fuel filler cap.	PCM	Go To PINPOINT TEST A: DTC P0442 SMALL LEAK IN EVAP SYSTEM, DTC P0456 VERY SMALL LEAK IN EVAP SYSTEM, DTC P0457 CHECK FOR MISSING OR LEAKING FUEL FILLER CAP .
P1443	Very small or no purge flow detected.	PCM	Go To PINPOINT TEST B: DTC P0455 MAJOR LEAK OR NO FLOW DETECTED OR DTC P1443 VERY SMALL OR NO PURGE FLOW DETECTED IN SYSTEM .
P1450	Excessive vacuum detected in the fuel tank.	PCM	Go To PINPOINT TEST C: DTC P1450 EXCESSIVE VACUUM DETECTED IN THE FUEL TANK .