2003 - 2009 Toyota 4Runner V6-2WD P0420 Catalytic Converter O2 Sensor Code

This video shows a 2005 V6-2WD Toyota 4Runner with a P0420 error code. It shows how to maintain and keep clean the Catalytic Converters and how to replace O2 (Oxygen) sensors - Bank 1 - Downstream (Denso 234-4260) sensor. It should take the alarm away and make your truck happy. 4Runner Ninja. Please subscribe, leave comments or ask questions.