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Home >> Lexus >> 2019 >> GX 460 Luxury >> 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 [08/2015 - ] >> 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 [08/2015 - ]: Description

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

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