Possible causes

– Wrong thermostat – Not at operating range
– Engine overheated
– Low engine coolant level
– Faulty Cylinder Head Temperature (CHT) sensor
– Cylinder Head Temperature (CHT) sensor harness is open or shorted
– Cylinder Head Temperature (CHT) sensor circuit poor electrical connection

When is the code detected?

The P1288 code is set if the engine reaches critical temperature.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1288 FORD Description

The Cylinder Head Temperature (CHT) Sensor is mounted into the wall of the cylinder head and is not connected to any coolant passages. The CHT sends a signal to the Powertrain Control Module (PCM) indicating the cylinder head temperature. If the temperature exceeds 126