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

P1290 Mercury 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 Mercury Description

    Indicates a CHT sensor circuit malfunction (shorted).

    Mercury Vehicle:Mercury Grand Marquis,Mercury Mariner,Mercury Milan,Mercury Mountaineer,Mercury Sable,
    CategoriesUncategorized