System Inspection
Engine
Engine Control - P0457 Evaporative Emission System-Leak detected (tank cap loose/off) - System Inspection
System Inspection
1. Check Fuel Cap
(1) Check fuel cap is firmly tightened.
(2) Check damage or leakage of fuel cap.
(3) Has a problem been found?
YES
1) Repair or replace as necessary and then, Go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.