Typical Enabling Conditions

Monitor runs whenever these DTCs not present


EVAP key-off monitor runs when all of following conditions met


Atmospheric pressure

525 to 825 mmHg (70 to 110 kPa)

Battery voltage

10.5 V or more

Vehicle speed

Below 2.5 mph (4 km/h)

Ignition switch


Engine condition

Not running

Fuel tank pressure sensor malfunction (P0450, P0452 and/or P0453)

Not detected

Purge VSV

Not operated by scan tool

Vent valve

Not operated by scan tool

Leak detection pump

Not operated by scan tool

Both of following conditions met before IG switch OFF

Conditions 1 and 2

1. Duration that vehicle driven

5 minutes or more

2. Purge flow



4.4° to 35°C (40° to 95° F)


4.4° to 35°C (40° to 95°F)

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