C0578 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C0578 – Left Front Solenoid Circuit High
C0578 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
C0578 Possible Causes
Faulty Left Front Solenoid,Left Front Solenoid harness is open or shorted,Left Front Solenoid circuit poor electrical connection
The strut actuator is controlled by the Continuously Variable Road Sensing Suspension (CVRSS) module with a Pulse-Width Modulation (PWM) signal. Switching the voltage ON and OFF at a high frequency, or pulse width modulation of 2.0 kHz, controls the amount of current delivered to the actuator. By controlling the amount of current to the actuator the CVRSS module controls the damping force in the strut. A higher level of damping force is achieved by providing correspondingly higher current levels, relating to higher percentages of PWM duty cycle. The default damper state, no battery voltage is one that provides a minimum damping force. The CVRSS module periodically commands each strut actuator to a preset PWM duty cycle in order to override the normal PWM command. During this preset PWM duty cycle, the CVRSS module is able to perform a diagnostic test on each strut actuator to determine if a malfunction is present. The preset PWM command can be either an OFF or ON state duty cycle.