Technical Definition:
Main Catalyst Efficiency Below Threshold (Bank 1)
Trouble Code: P0422
Address: 0x0422
System: Powertrain
Subsystem:
Address: 0x0422
System: Powertrain
Subsystem:
Technical Description:
Possible Causes:
Possible Symptoms:
Main Catalyst Efficiency Below Threshold Bank 1
Possible Solutions:
OBD-II Trouble Code Type:
Diagnostic Step:
Tech Notes:
– Warm Up Three Way Catalytic converter deterioration or malfunction
– Exhaust system leaks
– Loose front or rear HO2Ss
– Faulty front heater O2 sensor
– O2 sensors harness is open or shorted
– O2 sensors poor electrical connection