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Home >> Jeep >> 2025 >> Compass Limited >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - DTCS P0440 To P0463 >> DTC Troubleshooting >> P0455 EVAP System Large Leak >> Possible Causes
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Possible Causes

Possible Causes
EVAP SYSTEM PLUMBING LEAKING
CHARCOAL CANISTER LEAKING
FUEL TANK OR FUEL PUMP SEAL LEAKING
ESIM SWITCH OR WIRING ISSUE
ESIM MOUNTING SEAL LEAKING
ESIM INTERNAL CHECK VALVES LEAKING
ESIM MOUNTED INCORRECTLY ON THE CANISTER
PURGE SOLENOID LEAKING

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to:  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .