Cylinder Head Temperature Sensor A Circuit High

Common symptoms

What you'll notice

• Check and troubleshoot the wiring connections and harness of the Cylinder Head Temperature Sensor.
• Inspect and replace the Cylinder Head Temperature Sensor.
• Verify the operation of the Engine Control Module (ECM) and repair or replace if necessary.
• Examine the coolant levels and ensure proper circulation.
• Conduct a thorough inspection of the cylinder head for any signs of damage or malfunction.

Common causes

Most likely first

1. Faulty cylinder head temperature sensor
2. Wiring or connection issues related to the cylinder head temperature sensor
3. Engine overheating or high coolant temperature
4. Malfunctioning engine control module (ECM)
5. Faulty coolant temperature sensor

How to diagnose & fix

Work through it in order

1. Engine overheating
2. Loss of power or acceleration
3. Rough idle or misfires
4. Stalling or difficulty starting the engine
5. Increased fuel consumption