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Home >> Lexus >> 2002 >> IS 300 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0550: Power Steering Pressure Sensor Circuit Malfunction >> Circuit Description

Circuit Description

ECM controls idle speed based in part on input signal received from power steering pressure sensor. DTC P0550 sets if power steering pressure sensor signal is less than .28 volt or more than 4.9 volts for .5 second or more. Possible causes are:

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