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Home >> Jeep >> 2012 >> Compass Limited, AWD, Automatic CVT, CVT2 >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L & 2.4L - DTCS P0304 To P0615 >> Diagnosis And Testing >> P0440-General EVAP System Failure >> Possible Causes

Possible Causes

Possible Causes 
EVAP PURGE SOLENOID VACUUM SUPPLY
EVAP SYSTEM LEAK
EVAP PURGE HOSE/TUBE OBSTRUCTION
GROUND CIRCUIT OPEN OR HIGH RESISTANCE
(K107) ESIM SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
EVAP PURGE SOLENOID
EVAPORATIVE SYSTEM INTEGRITY MONITOR (ESIM) SWITCH
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .