Technical Definition:
Heated Catalyst Efficiency Below Threshold (Bank 1)
Trouble Code: P0423
Address: 0x0423
System: Powertrain
Subsystem:
Address: 0x0423
System: Powertrain
Subsystem:
Technical Description:
Possible Causes:
Possible Symptoms:
Heated Catalyst Efficiency Below Threshold Bank 1
Possible Solutions:
OBD-II Trouble Code Type:
Diagnostic Step:
Tech Notes:
– Air leak before catalytic converter
– Faulty oxygen sensor
– Faulty Catalytic Converter