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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Control Module (BCM) - DTCS B1856-13 To U1701-87 >> DTC Troubleshooting >> U1701-86-ECM (Engine Control Module) - Signal Invalid

U1701-86-ECM (Engine Control Module) - Signal Invalid

NOTE:

This DTC indicates a communication issue has occurred between the Sending  control module (Powertrain Control Module - PCM) and the Reporting  control module(s) that set this fault.

The COMMUNICATION DIAGNOSTIC PROCEDURE MUST  be performed before replacing any component(s) or module(s). Perform the COMMUNICATION DIAGNOSTIC PROCEDURE. Refer to COMMUNICATION DIAGNOSTIC PROCEDURE .