C1477 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C1477 – High Pressure Hydraulic Circuit Leakage Plausibility Failure


C1477 Possible Symptoms


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


C1477 Possible Causes


Brake System Bleeding,Faulty Hydraulic Control Unit (HCU),Hydraulic Control Unit (HCU) harness is open or shorted,Hydraulic Control Unit (HCU) circuit poor electrical connection


C1477 Description


The Hydraulic Control Unit (HCU) monitors the High Pressure Hydraulic Circuit. The HCU sets the OBDII code when the High Pressure Hydraulic Circuit is not to factory specifications.