P0456

Tests 367 - 368:

Tests 369 - 370:

SYMPTOM
P0456 - EVAP LEAK MONITOR SMALL (0.020) LEAK DETECTED

TEST NOTE
This symptom is diagnosed using the test P0442 - EVAP LEAK MONITOR MEDIUM (0.040) LEAK DETECTED.

WHEN MONITORED
Immediately after a cold start, with battery/ambient temperature between 40 °F - 90 °F and coolant temperature within 10 °F of battery/ambient temperature.

SET CONDITION
If there is a leak larger than 0.020" and smaller than 0.040" in the evaporative system.

POSSIBLE CAUSES
- Confirmed leak in the EVAP system
- Intermittent LDP monitor failure