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Symptom: P0455-EVAP SYSTEM LARGE LEAK When Monitored and Set Condition: P0455-EVAP SYSTEM LARGE LEAK When Monitored: Engine Running. Cold start test. Fuel Level greater than 12%. Ambient Temperature between 4°C and 32°C (39°F and 89°F) Close Loop fuel system. Test runs Set Condition: The PCM activates the EVAP Purge Solenoid to pull the EVAP system into a vacuum to close the NVLD swtich. Once the NVLD switch is closed, the PCM turns the POSSIBLE CAUSES GOOD TRIP EQUAL TO ZERO INTERMITTENT CONDITION VISUAL AND PHYSICAL INSPECTION VERIFY EVAPORATIVE EMISSION SYSTEM LEAK EVAPORATIVE EMISSION LEAK DETECTION EVAP PURGE SOLENOID OPERATION TEST ACTION APPLICABILITY 1 Check for any related TSBs before continuing. t, read DTCs and record the related Freeze Frame data. Is the Good Trip Counter displayed and equal to zero? All Yes → Go To 2 No → Refer to the INTERMITTENT CONDITION Symptom (Diagnos- tic Procedure). 157 DRIVEABILITY - NGC |