Diagnostic Aids

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Possible causes of this DTC are as follows:

Check the ECM DTCs.
Check the EBCM for any communication DTCs, and diagnose any powertrain or communication DTCs first.
The EBCM is not receiving the message from the ECM.
The CAN HI and CAN LO circuits are shorted together.
The CAN HI and CAN LO circuit is shorted to ground.
The CAN HI and CAN LO circuit is shorted to voltage.