DTC P1220 Cadillac

TCM Lost Communication

TCM Lost Communication

Description

TCM cannot read the data from the ECM through the CAN-BUS line.

Cause and Solution

Open or short in CAN communication harness Faulty ECM PCM Faulty TCM

Video Guide

Duration: PT3M52S | Uploaded: 2020-06-20

Diagnostic Info

  • DTC Code: P1220
  • Brand: Cadillac
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