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Home >> Lexus >> 2019 >> LX 570 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (4 Of 7) >> SFI System >> DTC P0550: Power Steering Pressure Sensor Circuit Malfunction; DTC P0552: Power Steering Pressure Sensor Circuit Low Input; DTC P0553: Power Steering Pressure Sensor Circuit High Input [09/2015 - ] >> Description
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DTC P0550: Power Steering Pressure Sensor Circuit Malfunction; DTC P0552: Power Steering Pressure Sensor Circuit Low Input; DTC P0553: Power Steering Pressure Sensor Circuit High Input [09/2015 - ]: Description

The power steering oil pressure sensor is turned on when a power steering wheel load occurs by turning the steering wheel. The ECM regulates the engine idling RPM according to the voltage output of the sensor.

DTC No. DTC Detection Condition Trouble Area
P0550 Power steering oil pressure sensor voltage below 0.28 V, or higher than 4.9 V for 0.5 seconds while engine running.
(1 trip detection logic)
  • Open or short in power steering oil pressure sensor circuit
  • Power steering oil pressure sensor
  • ECM
P0552 Power steering oil pressure sensor voltage below 0.28 V for 0.5 seconds while engine running.
(1 trip detection logic)
  • Open or short in power steering oil pressure sensor circuit
  • Power steering oil pressure sensor
  • ECM
P0553 Power steering oil pressure sensor voltage higher than 4.9 V for 0.5 seconds while engine running.
(1 trip detection logic)
  • Open or short in power steering oil pressure sensor circuit
  • Power steering oil pressure sensor
  • ECM