P0550

P0550 MERCEDES-BENZ – Power Steering Pressure Sensor Circuit Malfunction

Repair Importance Level: 2/3

Repair Difficulty Level: 2/3

Possible causes

.Faulty Power Steering Pressure

. Sensor Power Steering Pressure

.Sensor harness is open or shorted

. Power Steering Pressure Sensor

. circuit poor electrical connection

What does this mean? When is the code detected? An excessively low or high voltage from the sensor is sent to ECM. Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) Power steering inoperative P0550 Mercedes-benz Description Power steering pressure (PSP) sensor is installed to the power steering high-pressure tube and detects a power steering load. This sensor is a potentiometer which transforms the power steering load into output voltage, and emits the voltage signal to the Engine Control Module (ECM). The ECM controls the electric throttle control actuator and adjusts the throttle valve opening angle to increase the engine speed and adjusts the idle speed for the increased load.