P0423 – Heated catalytic converter, bank 1 -efficiency below threshold

By BAT Team (Contact Me)
Last Updated 2015-11-18
A site with free advice from mechanics.

Code	Fault Location	Probable Cause
P0423	Heated catalytic converter, bank 1 -efficiency below threshold (Buy Part On Amazon)	Catalytic converter, wiring, HO2S 2

We recommend Torque Pro

Help Us Help You

We have not gotten around to publishing a technical guide specifically for P0423 – Heated catalytic converter, bank 1 -efficiency below threshold yet. To escalate the priority of this guide in our production queue, we appreciate a $9.99 donation. We will publish a guide within 30 days of payment.