Typical Enabling Conditions

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


Atmospheric pressure

70 to 110 kPa-a (525 to 825 mmHg-a)

Battery voltage

10.5 V or more

Vehicle speed

Below 4 km/h (2.5 mph)

Ignition switch


Time after key off

5 or 7 or 9.5 hours

Canister pressure sensor malfunction (P0450, P0451, P0452 and 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 key off

Conditions 1 and 2

1. Duration that vehicle driven

5 minutes or more

2. EVAP purge operation



4.4° to 35°C (40° to 95° F)


4.4°to 35°C (40° to 95°F)

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