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Home >> Scion >> 2005 >> xA Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> SFI System >> DTC P0550, P0552, P0553: Power Steering Pressure Sensor/Switch Circuit, Power Steering Pressure Sensor Circuit Low Input, Power Steering Pressure Sensor Circuit High Input >> Circuit Description
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Circuit 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 - P0550, P0552 AND P0553 TROUBLE DETECTION

DTC No. DTC Detection Conditions Trouble Areas
P0550 Open or short in power steering oil pressure sensor circuit detected for more than 3 seconds after ignition switch turned to ON. (1 trip detection logic)
  • Open or short in power steering oil pressure sensor circuit
  • Power steering oil pressure sensor
  • ECM
P0552 Open in power steering oil pressure sensor circuit detected for more than 3 seconds after ignition switch turned to ON.
  • Open in power steering oil pressure sensor circuit
  • Power steering oil pressure sensor
  • ECM
P0553 Short in power steering oil pressure sensor circuit detected for more than 3 seconds after ignition switch turned to ON.
  • Short in power steering oil pressure sensor circuit
  • Power steering oil pressure sensor
  • ECM