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Home >> Jeep >> 2025 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (2.0L - DTCS P1573 To P1946) >> DTC Troubleshooting >> P16FA-Engine Disabled - No Immobilizer Signal From HCP >> 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
INCORRECT OR NO VIN PROGRAMMED IN THE PCM
NO COMMUNICATION WITH THE POWER INVERTER MODULE
IGNITION KEY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to:  2.0L - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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