Audi Check Engine Code P0420
Check engine light Sensor o2 oxygen p0420 bank p0140 circuit sensors code catalyst clean efficiency below system threshold catalytic converter ho2s low heater P0420 code check engine light audiworld bank threshold efficiency catalyst below system
P0043 Code: HO2S Heater Control Circuit Low (Bank 1 Sensor 3) - In The
P0043 code: ho2s heater control circuit low (bank 1 sensor 3)
P0043 Code: HO2S Heater Control Circuit Low (Bank 1 Sensor 3) - In The
Check Engine Light - Code P0420 - AudiWorld Forums