Faulty Electrical Power Steering (EPS) Control Unit
Electrical Power Steering Control Unit harness is open or shorted
Electrical Power Steering Control Unit circuit poor electrical connection
Faulty Engine Control Module (ECM)
Engine Light ON (or Service Engine Soon Warning Light)
The Controller Area Network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously using two signal lines (CANH and CANL). When the Engine Control Module (ECM) does not receive signals from the Electrical Power Steering (EPS) Control Unit via the CAN lines for a set time or more, the ECM detects a malfunction and a Diagnostic Trouble Code (DTC) is stored.