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Home >> Jeep >> 2025 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 55 (8P75PH Automatic Transmission - DTCS P1DAC-00 To P2880-00) >> DTC Troubleshooting >> P1DDE-00 Ignition Run/Start Input 1/2 Correlation >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
HIGH SIDE CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
HIGH SIDE CONTROL CIRCUIT SHORTED TO GROUND
IGNITION OFF/RUN/START CONTROL OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
POWERTRAIN CONTROL MODULE (PCM)
TRANSMISSION CONTROL MODULE (TCM)

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