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Symptom: P0457-LOOSE FUEL CAP When Monitored and Set Condition: 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 LOOSE OR MISSING FUEL FILL CAP INTERMITTENT CONDITION NVLD SERVICE TEST EVAPORATIVE EMISSION LEAK DETECTION EVAP PURGE SOLENOID OPERATION NVLD SWITCH OPERATION TEST ACTION APPLICABILITY 1 NOTE: After the PCM has determined the leak test inconclusive and sees an t, read DTCs and record the related Freeze Frame data. Is the Good Trip Counter displayed and equal to zero? All Yes → Go To 2 No → Refer to the INTERMITTENT CONDITION symptom in the Driveability category. 2 Perform a visual and physical inspection of the Fuel Fill Cap and the fill tube. All Yes → Repair or replace the fuel fill cap as needed. Ensure proper fuel fill cap installation. Once the repair is complete continue to step No → Go To 3 177 DRIVEABILITY - NGC |