Posts Tagged: P0430
OBDII P0420 code: What causes it?
Understanding the Relationship Between the O2 Sensors and a OBDII P0420 Code One common trouble code that many vehicle owners encounter is the P0420 code. This code indicates a catalytic converter that’s operating below the required efficiency, specifically that it is below the threshold for bank 1. Many DIYers think a bad O2 sense is a possible cause of OBDII P0420 code. That’s rarely ever the case. It’s faulty reasoning because, in most cases, a bad O2 sensor would set an O2 sensor code, not a catalytic converter code. Plus, … Read More
Code P0420: What it means and what to do about it
Learn what code P0420 means and how to fix it A P0420 code means your catalytic converter has failed an efficiency test. In other words, it’s not removing harmful combustion byproducts from the exhaust. Many people think that the way to fix code P0420 is to replace the oxygen sensors. That’s wrong. In fact, the vehicle computer can’t even come to the conclusion that your catalytic converter has failed the efficiency test if your oxygen sensors are bad. So, don’t waste your time and money on oxygen sensors. What to … Read More
Fix Code P0430: Resolving Catalytic Converter Issues
Learn how to diagnose and fix code P0430 Code P0430 means the catalytic converter for bank 2 has failed its testing. The oxygen sensor in front of the catalytic converter switches back and forth between rich and lean as the computer constantly changes the air-fuel mixture. If the catalytic converter is doing its job, the downstream oxygen sensor should not switch between rich and lean. If it does, that means the catalytic converter is NOT doing its job, and the computer turns on the check engine light and sets code … Read More