Manufacturer-specific code

This code means different things on different makes. Find yours below.

• Ford

  Cylinder head overtemperature sensed

  The cylinder head temperature (CHT) sensor reports that the head is overheating.

  Likely causes, most likely first

  1. 01Low coolant from a leak
  2. 02Thermostat stuck closed
  3. 03Cooling fan not running
  4. 04Failing water pump
  5. 05Head gasket failure
  6. 06Faulty CHT sensor (less common)

  Severity: Stop driving · Workshop job