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Symptom: P0440-GENERAL EVAP SYSTEM FAILURE When Monitored and Set Condition: P0440-GENERAL EVAP SYSTEM FAILURE When Monitored: Engine Running. Fuel Level greater than 12%. Ambient Temperature between 4°C and 32°C (39°F and 89°F) Set Condition: The PCM does not see the NVLD switch close during the medium/large leak test. The PCM will then increase the vacuum supply to the EVAP system by POSSIBLE CAUSES GOOD TRIP EQUAL TO ZERO VISUAL AND PHYSICAL INSPECTION EVAP PURGE SOLENOID VACUUM SUPPLY INSPECTION EVAP PURGE SOLENOID STUCK CLOSED NVLD SWITCH OPERATION (Z1) GROUND CIRCUIT OPEN NVLD ASSEMBLY (K107) NVLD SWITCH SIGNAL CIRCUIT OPEN EVAPORATIVE EMISSION LEAK DETECTION PCM PCM TEST ACTION APPLICABILITY 1 NOTE: If any of the following DTCs are set (P0443, P0452, P0453, P0498 or 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 in the Driveability category. 161 DRIVEABILITY - NGC |