P0552 TOYOTA Power Steering Pressure Sensor Circuit Low Input

Possible causes
– Faulty Power Steering Pressure Sensor
– Power Steering Pressure Sensor harness is open or shorted
– Power Steering Pressure Sensor circuit poor electrical connection
When is the code detected?
A low voltage from the Power Steering Pressure Sensor is sent to Engine Control Module (ECM).
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Power steering inoperative
P0552 TOYOTA 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.
TOYOTA Technical Service Bulletins for P0552 code
2007 TOYOTA TUNDRA STEERING:ELECTRIC POWER ASSIST SYSTEM
2008 TOYOTA LAND CRUISER STEERING:ELECTRIC POWER ASSIST SYSTEM
2008 TOYOTA SEQUOIA STEERING:ELECTRIC POWER ASSIST SYSTEM
2008 TOYOTA TUNDRA STEERING:ELECTRIC POWER ASSIST SYSTEM