Component Inspection

P0420 Catalyst System Efficiency below Threshold (Bank 1)

Inspection/Repair - Component Inspection

Component Inspection

Rear HO2S (S2) check
1. S2 visual check
> Check assembling state of S2. (Check the interference between sensor wiring and exhaust pipe.)
> Check corrosion, contamination, or damage on sensor terminal and connector.
2. Is there something wrong?





Catalyst converter check
1. Catalyst converter visual check
> Check discoloration by over-heating.
> Check deflection or crack (hole).
> Check noise.
2. Check whether the catalyst converter is genuine.
3. After erase the DTC, drive the vehicle more than 60 sec according to "Enable Conditions" . And then, confirm DTC.
4. Is there something wrong?