P0597 Lexus Thermostat Heater Control Circuit Open
Possible causes
– Failed Engine Cooling Thermostat
– Engine Cooling Thermostat harness is open or shorted
– Engine Cooling Thermostat circuit poor electrical connection
– Engine Cooling Thermostat harness is open or shorted
– Engine Cooling Thermostat circuit poor electrical connection
Tech description
If there are not coolant system leaks, replaced the thermostat to fix the problem.
What about the obd code?
The P0597 Lexus is triggered when there is an open or short thermostat heather control circuit.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
Lexus Vehicle:Lexus ES,Lexus GS,Lexus GX,Lexus HS,Lexus IS,Lexus LFA,Lexus LS,Lexus LX,Lexus RX,Lexus RX,Lexus SC,Lexus GS350,Lexus GS450H,Lexus IS250,Lexus GX460,Lexus IS350,Lexus LS460,Lexus LS600H,Lexus LX570,Lexus RX350