2001 Chrysler T/C Van - P0456, P0442, P0455 Evaporative Emission System Fault Diagnosis
The gas cap has been tested by emissions and passed. This suggests the issue is not with the cap itself but likely stems from vacuum lines or another component in the evaporative emission system. If the gas cap is not the root cause, what are the most common causes of P0456, P0442, and P0455 codes on a 2001 Chrysler T/C Van? Once the underlying issue is resolved, will the check engine light turn off after disconnecting the battery for a few minutes to reset the system?
Inspect the vacuum lines and connections in the evaporative emission system. Leaks or loose fittings are common causes of P0456, P0-442, and P0455 on this model.