CUSTOMER CONCERN The check-engine light is on with DTC P0441 for incorrect EVAP purge flow. CAUSE The confirmed repair identified a failed canister purge control solenoid valve. CORRECTION Remove and replace the failed canister purge control solenoid valve, clear DTC P0441, and verify the EVAP monitor completes without resetting the code.

CUSTOMER CONCERN The fuel door intermittently will not open and the fuel tank is difficult to fill. CAUSE The charcoal canister was restricted, preventing the fuel tank from venting normally before the fuel door opened and during refueling. CORRECTION Remove and replace the restricted charcoal canister and verify the fuel door opens normally and the tank accepts fuel without restriction.

CUSTOMER CONCERN The check-engine light is on and fault 21B000 is stored for the fuel-tank pressure-sensor communication circuit. CAUSE The fuel-tank pressure sensor failed and stopped communicating on its Local Interconnect Network circuit. CORRECTION Remove and replace the failed fuel-tank pressure sensor, clear fault 21B000, and verify pressure-sensor communication and emissions-system operation.

CUSTOMER CONCERN The check-engine light remains on with fault 106004 after the fuel-tank vent valve was replaced. CAUSE Raw fuel contaminated the evaporative-emissions charcoal canister after the range-extender fuel tank was overfilled. CORRECTION Remove and replace the fuel-vapor charcoal canister, clear fault 106004, and verify the check-engine light remains off.

CUSTOMER CONCERN Customer reports the fuel-pump nozzle repeatedly shuts off while refueling. DTC P1450 may be stored in the Powertrain Control Module. CAUSE Inspection confirmed a restriction in the EVAP fresh-air pipe, preventing the fuel-tank vapor system from venting properly during refueling. CORRECTION Clean the restricted EVAP fresh-air pipe, remove the obstruction, and verify normal refueling and EVAP system operation.