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Home >> Jeep >> 2009 >> Wrangler X, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0205 To P0440 - NGC >> P0440-General EVAP System Failure >> Possible Causes

Possible Causes

Possible Causes 
EVAP PURGE SOLENOID VACUUM SUPPLY
EVAP PURGE SYSTEM HOSE/TUBE AND FRESH AIR FILTER OBSTRUCTION
(Z905) GROUND CIRCUIT OPEN
(K107) ESIM SIGNAL CIRCUIT OPEN
EVAPORATIVE EMISSION LEAK
EVAPORATIVE SYSTEM INTEGRITY MONITOR SWITCH
EVAPORATIVE PURGE SOLENOID
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure  .