DTC P128A: Cylinder Head Temperature (CHT) Sensor Circuit Intermittent/Erratic
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.
P128A - CYLINDER HEAD TEMPERATURE (CHT) SENSOR CIRCUIT INTERMITTENT/ERRATIC
| Description: | Indicates the CHT circuit became intermittently open or shorted while the engine was running. | ||
| Possible Causes: |
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| Diagnostic Aids: | Monitor the CHT on a diagnostic tool. Look for sudden changes in the reading when the harness is wiggled or the sensor is tapped. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | - | - | GO to DL: Cylinder Head Temperature (CHT) Sensor STEP DL14. |