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Home >> Jeep >> 2021 >> Renegade Trailhawk >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> (Active Cruise Control (Acc) Module - Electrical Diagnostics) >> DTC Troubleshooting >> C1439-86: Engine Torque Signals From ECM (Engine Control Module) Not Valid - Signal Invalid >> Possible Causes
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Possible Causes

Possible Causes
POWERTRAIN CONTROL MODULE (PCM) DTCS PRESENT
POWERTRAIN CONTROL MODULE (PCM)

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