C1171 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C1171 – Engine Check Signal


C1171 Possible Symptoms


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


C1171 Possible Causes


Faulty Vehicle Dynamic Control (VDC) Control Unit,Vehicle Dynamic Control (VDC) Control Unit harness is open or shorted,Vehicle Dynamic Control (VDC) Control Unit circuit poor electrical connection,Faulty Engine Control Module (ECM)


C1171 Description


The Engine Control Module (ECM) monitors the communication between Vehicle Dynamic Control (VDC) Control Unit or Control Area Network (CAN)-Local Area Network (LAN) Converter (CLC). The ECM sets the OBDII Code when the communication between the VDC and ECM is abnormal.