Home >> Jaguar >> 2013 >> XJ Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Diagnostic Trouble Code Index DTC: Engine Control Module (ECM) V6 S/C 3.0L Petrol -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: V6 S/C 3.0L Petrol, Engine Control Module (ECM) >> Description And Operation >> Powertrain Control Module (Pcm) - 3.0L Petrol >> P0597-4B - Thermostat Heater Control Circuit/Open - Over temperature >> Possible Causes