C056D – Electronic Control Unit Hardware

C056D Possible Symptoms

Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)

C056D Possible Causes

Faulty Electronic Control Unit,Electronic Control Unit harness is open or shorted,Electronic Control Unit circuit poor electrical connection

C056D Description

The internal fault detection is handled inside the control module. The symptom byte listed in the DTC Descriptor is for engineering reference only. No external circuit diagnosis is involved.