× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: p0420/p0430
Posted to Technical Discussion Forum on 5/1/2023

Hi John,

[...trimmed text...]

What is "randomly"? These cat codes set because the PCM is not happy with the catalytic converter's performance. The cats aren't doing their job. In most cases, only a new cat will fix it.... Login to read more.