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Home >> Infiniti >> 2013 >> QX56 RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0500 To P1424 >> DTC P0550: PSP Sensor >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC No. Trouble diagnosis name
(Trouble diagnosis content)		 DTC detecting condition Possible cause
P0550 PW ST P SEN/CIRC
(Power steering pressure sensor circuit)		 An excessively low or high voltage from the sensor is sent to ECM.
  • Harness or connectors

    (The Fuel rail pressure sensor circuit is open or shorted.)

    (The Power steering pressure sensor circuit is open or shorted)

    (The Electrically-controlled cooling fan coupling circuit is open or shorted)

  • Fuel rail pressure sensor
  • Power steering pressure sensor
  • Electrically-controlled cooling fan coupling
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