P0456

Tests 1 - 2:

Tests 3 - 4:

Test 5:

SYMPTOM
P0456-EVAP LEAK MONITOR LEAK DETECTED

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

WHEN MONITORED
Immediately after a cold start, with battery/ambient temperature between 4 °C (40 °F) and 30 °C (90 °F) and coolant temperature within -12 °C (20 °F) of battery/ambient.

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

POSSIBLE CAUSES
- Evaporative Emission Leak Detection
- EVAP Purge Solenoid Leaks/Stuck Open
- Intermittent LDP Monitor Failure