2.5K views · 40 reactions | [nonda Auto DIY Center] P0420 is the most common engine error code, it stands for catalyst system efficiency below threshold. Check out this self-repair video tutorial created by nonda's expert mechanics. Fix it yourself and save $$$ on your repair fees. Don't forget to claim your FREE ZUS Smart Vehicle Health Monitor here https://bit.ly/FreeZUS-ADC and get an in-depth diagnosis of your vehicle condition. | nonda | Facebook

🤓The More You Know - L&R Edition🤓 Do you have a check engine light on? Did you get it checked out and discover it's a PO420 code? If so, Ryan explains what that means and the best ways to address the issue. If you need your check engine light diagnosed, schedule your appointment TODAY! Schedule your appointment TODAY! ☎️651-483-9246 At L&R Automotive, it's our goal to keep you on the road and safe! Each week, we will be releasing a video giving you tips, tricks and helpful reminders about your