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Emission Control System Evaporative Emission (EVAP) Controls (cont'd) The scan tool indicates Diagnostic Trouble Code (DTC) P1457: Evaporative Emission (EVAP) control system leak detected (EVAP control canister system). '96 - 99 models: Troubleshooting Flowchart The MIL has been reported on. Do the fuel tank pressure sensor ). Is the fuel tank pressure sensor OK? Fuel tank pressure sensor is OK. EVAP purge control solenoid Check the EVAP purge control 1. Disconnect the vacuum hose from the EVAP purge control hose and a vacuum pump to the EVAP purse control 2. Connect the PCM connector terminal A23 to the body 3. Turn the ignition switch ON (II). Dose the valve hold vacuum? Check for an open in the wire (PCS line): 1. Turn the ignition switch OFF. 2. Disconnect the EVAP purge control solenoid valve 2P con- 3. Check for continuity between the EVAP purge control minal No. 1 and body ground. Is there continuity? YES Check for an open in the wire (IG1 line): EVAP bypass solenoid valve 2P connector terminal No. 2 and Replace the fuel tank pressure PCM CONNECTOR A (26P) Wire side of EVAP purge control solenoid ). EVAP PURGE CONTROL SOLENOID Repair open in the wire between the EVAP purge control solenoid NO Wire side of YES NO JUMPER YES NO Main Menu Table of Contents |