Chrysler 300M 2002 Service Manual page 2619

DRIVEABILITY - NGC
Symptom:
P0456-EVAP SYSTEM SMALL LEAK
When Monitored and Set Condition:
P0456-EVAP SYSTEM SMALL LEAK
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.
INTERMITTENT CONDITION
VISUAL AND PHYSICAL INSPECTION
EVAPORATIVE EMISSION LEAK DETECTION
TEST
1 NOTE: The difference in ambient temperature, outside temp VS shop temp,
may conceal a leak, it is best to perform this test after the vehicle's
temperature has stabilized in the work area.
Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
→ Go To 4
No
2 Perform a visual and physical inspection of the entire Evaporative Emission system.
Check for the following conditions:
- Holes or cracks
- Loose seal points
- Evidence of damaged components
- Incorrect routing of hoses and tubes
- Fuel Cap gasket seal
Were any of the above conditions found?
Yes → Repair as necessary.
→ Go To 3
No
POSSIBLE CAUSES
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 6.
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APPLICABILITY
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