Home >> Land Rover >> 2017 >> Range Rover Autobiography >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Diagnostic Trouble Code Index V8 S/C 5.0L Petrol, DTC: Powertrain Control Module (Pcm) -- Range Rover/L405 >> Diagnostic Trouble Code Index V8 SC 5.0L Petrol, DTC Powertrain Control Module >> Description And Operation >> DTC P0597-4B: Thermostat Heater Control Circuit/Open - Over temperature >> Possible Causes