Diagnostic trouble code (DTC) information ECM-A03B

Condition 

The control modules communicate with each other in a network via a standardized serial communication procedure - CAN (Controller Area Network) - to exchange information.

The diagnostic trouble code (DTC) is generated if the engine control module (ECM) registers a fault in its communication with the central electronic module (CEM).

Substitute Value 

• None.

Possible Source 

• Open-circuit in the control area network (CAN) wiring.
• Damaged central electronic module (CEM).

Fault symptom[s] 

• Switch to gas power not possible.