P0457

Test 1:

Test 2 - Test 4:

Test 5:

Test 6:

Test 7 - Test 8:

SYMPTOM
P0457-LOOSE FUEL CAP

WHEN MONITORED
Ignition on. Ambient temperature between 4° C and 32° C (39° F and 89° F) Closed Loop fuel system.

SET CONDITION
The PCM has detected an EVAP System leak after a fuel level increase. Two Trip Fault. Three good trips to turn off the MIL.

POSSIBLE CAUSES
- Good trip equal to zero
- Vehicle history and service bulletin investigation
- Loose or missing fuel fill cap
- NVLD service test
- Verify evaporative emission system leak
- EVAP purge solenoid operation
- Leak at gas cap
- Gas cap
- NVLD