C1739 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C1739 – Right Rear Height Control Solenoid Valve Circuit

 

C1739 Possible Symptoms

 

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

 

C1739 Possible Causes

 

Faulty Right Rear Height Control Solenoid Valve,Right Rear Height Control Solenoid Valve harness is open or shorted,Right Rear Height Control Solenoid Valve circuit poor electrical connection,Faulty Suspension Electronic Control Unit (ECU)

 

C1739 Description

 

The Suspension Electronic Control Unit (ECU) energizes the height control solenoid valve, which opens the valve and leads compressed air to the pneumatic cylinder, thus raising the vehicle height. When the vehicle height is lowered, the ECU energizes not only the height control solenoid valve but also the exhaust valve which open the valve and discharge the compressed air in the pneumatic cylinder to the atmosphere. Front and rear height control valves have 2 solenoid valves to control right hand and left hand pneumatic cylinders separately. The exhaust valve is located on the compressor unit, and has one valve only.