P1289
Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Unstable engine operation
- Increased fuel consumption
- Difficulty starting the engine
- Engine overheating
- Check Engine Light Illuminates
Causes
- Head temperature sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Problems with the engine ECU
- Mechanical damage to the wiring harness
How to Fix
- Check the resistance of the head temperature sensor
- Inspect the connector and wires for damage
- Check the voltage in the sensor circuit
- Replace sensor if necessary
- Test engine operation after repair