P1290 Lexus Cylinder Head Temperature Sensor Signal Less Than Self-Test Range

P1290 Lexus Cylinder Head Temperature Sensor Signal Less Than Self-Test Range

Possible causes
  • Grounded circuit in CHT harness.
  • Damaged CHT sensor.
  • Improper harness connection.
  • Damaged PCM.
    • Symptoms
    – Engine Light ON (or Service Engine Soon Warning Light)
    P1290 Lexus Description

    Indicates a CHT sensor circuit malfunction (shorted).

    Lexus Vehicle:Lexus ES,Lexus GS,Lexus GX,Lexus HS,Lexus IS,Lexus LFA,Lexus LS,Lexus LX,Lexus RX,Lexus RX,Lexus SC,Lexus GS350,Lexus GS450H,Lexus IS250,Lexus GX460,Lexus IS350,Lexus LS460,Lexus LS600H,Lexus LX570,Lexus RX350
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