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Theory of Operation The Evap Purge Monitor tests the integrity of the hoses/tube between the throttle body/intake and the fuel tank. The • When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC EVAP PURGE SOLENOID VACUUM SUPPLY EVAP PURGE HOSE/TUBE OBSTRUCTION EVAP PURGE SOLENOID POWERTRAIN CONTROL MODULE (PCM) Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. EVAP SYSTEM PRETEST Ignition on, engine not running. With a scan tool, select View DTCs. Record the Freeze Frame data if any DTCs are present. Review the vehicle repair history for items related to the current condition. Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly. Check for any related technical service bulletins (TSBs) and, if any apply, follow the recommended procedure. Select the appropriate response from the list below: A technical service bulletin (TSB) repaired the condition. Test complete. A DTC is present, no TSBs apply, or the TSB did not repair the condition. Go to 2 2. DTC IS ACTIVE NOTE: If P0443 is set along with this DTC, perform the diagnostic procedure for P0443 before continuing Allow the engine to idle. Using the scan tool, perform the ESIM FORCED MONITOR TEST. Allow the test to complete. With a scan tool, select View DTCs. PM ENGINE ELECTRICAL DIAGNOSTICS - GPEC 9 - 375 |