Technical Definition:
Catalyst Heater Control Circuit (Bank 2)
Trouble Code: P0439
Address: 0x0439
System: Powertrain
Subsystem: Auxiliary Emission Controls
Address: 0x0439
System: Powertrain
Subsystem: Auxiliary Emission Controls
Technical Description:
Possible Causes:
Possible Symptoms:
Catalyst Heater Control Circuit Bank 2
Possible Solutions:
OBD-II Trouble Code Type:
Diagnostic Step:
Tech Notes:
– Catalyst Temperature Sensor harness is open or shorted
– Catalyst Temperature Sensor circuit poor electrical connection
– Faulty Catalyst Temperature Sensor