DTC P1290: Cylinder Head Temperature (CHT) Sensor Circuit Low Input
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P1290 - CYLINDER HEAD TEMPERATURE (CHT) SENSOR CIRCUIT LOW INPUT
| Description: | Indicates a CHT sensor circuit malfunction (shorted). | ||
| Possible Causes: |
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| Diagnostic Aids: | A CHT V PID reading of less than 0.2 volt with key on engine off (KOEO), or during any engine operating mode, indicates a hard fault. Note: DTC P0117 may also be reported when this DTC is set. Either of these DTCs activate the MIL. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to DL: Cylinder Head Temperature (CHT) Sensor STEP DL7. | GO to DL: Cylinder Head Temperature (CHT) Sensor STEP DL7. | GO to DL: Cylinder Head Temperature (CHT) Sensor STEP DL14. |