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Optional Information: 2001 Dodge 2.4Already Tried: p0456
this faulr code is a small evap leak--
Symptom:
P0456-EVAP SYSTEM SMALL LEAK
When Monitored and Set Condition:
When Monitored: Ignition off. Fuel Level less than 88%. Ambient Temperature between
4°C to 43°C (39°F to 109°F)
Set Condition: Due to temperature changes a vacuum is created in the fuel tank and
EVAP system. With the EVAP system sealed, the PCM monitors the NVLD switch. If the
NVLD switch does not close within a calibrated amount of time an error is detected.
POSSIBLE CAUSES
GOOD TRIP EQUAL TO ZERO
LEAK AT GAS CAP
VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION
VISUAL AND PHYSICAL INSPECTION
VERIFY EVAPORATIVE EMISSION SYSTEM LEAK
EVAP PURGE SOLENOID OPERATION
EVAPORATIVE EMISSION LEAK DETECTION
GAS CAP
NVLD
Experience: DODGE SERVICE MANAGER- 20 + YEARS