P1290 2008 FORD FUSION - Cylinder Head Temperature Sensor Signal Less Than Self-Test Range
P1290 2008 Ford Fusion Possible Causes
- Wrong thermostat
- Engine overheated
- Low engine coolant level
- Faulty Cylinder Head Temperature (CHT) sensor
- Cylinder Head Temperature (CHT) sensor harness is open or shorted
- Cylinder Head Temperature (CHT) sensor circuit poor electrical connection
Cost of diagnosing the P1290 2008 Ford Fusion code
The cost of diagnosing the P1290 2008 Ford Fusion code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected?
The Engine Control Module (ECM) detected the cylinder head temp below expected values
P1290 2008 Ford Fusion Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1290 2008 Ford Fusion Meaning
The Cylinder Head Temperature (CHT) Sensor is mounted into the wall of the cylinder head and is not connected to any coolant passages. The CHT sends a signal to the Powertrain Control Module (PCM
) indicating the cylinder head temperature. If the temperature exceeds 126°C (-258°F), the PCM
disables four fuel injectors at a time. The PCM
will alternate which four injectors are disabled every 32 engine cycles. The four cylinders that are not being fuel injected act as air pumps to aid in cooling the engine. If the temperature exceeds 154 °C (310°F), the PCM
disables all of the fuel injectors until the engine temperature drops below 154°C (310°F).