P063F

Symptoms

• Check Engine light comes on
• Cold start problems
• Unstable idle when warming up
• Increased fuel consumption
• The engine may not reach operating temperature or overheat

Causes

• Coolant temperature (ECT) sensor malfunction
• Open or short circuit in the ECT sensor circuit
• Adaptation failed after replacing ECU or sensor
• Oxidation of the ECT sensor connector
• ECU malfunction

How to Fix

1. Check the ECT sensor signal with a scanner (with a cold engine the value should be close to the ambient temperature)
2. Inspect the ECT sensor connector for oxidation and damage.
3. Check the resistance of the ECT sensor with a multimeter
4. Inspect the wiring from the sensor to the ECU
5. If the sensor is faulty, replace it
6. Perform the onboarding procedure if necessary

Related codes

Error P063F by Vehicle Brand