C056D Code: Meaning, Causes, and Symptoms | OBD2 Codes

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.