P1290
Cylinder Head Temperature Sensor Low Input
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–44 (est.)
Symptoms
- Unstable engine idling
- Increased fuel consumption
- Difficult cold start
- Check Engine Light Is On
- Reduced engine power
Causes
- Faulty cylinder head temperature sensor
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Corrosion on sensor terminals
- Malfunction of the engine control unit (rare)
How to Fix
- Check the condition of the sensor and its connector
- Diagnose the sensor circuit for open and short circuit
- Measure the sensor resistance (compare with the norm)
- Replace the cylinder head temperature sensor if necessary
- Clean sensor connector contacts