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Home >> Jeep >> 2009 >> Liberty Limited, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P1897 To P2174 (Gas) >> P1897-Level 1 Rpm Bus Unlock >> Possible Causes

Possible Causes

Possible Causes 
POWERTRAIN CONTROL MODULE (PCM)

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