Posted on 4/25/2025
🔧 What Does the PO430 Code Mean? (And Why Your Check Engine Light Is On) You’re driving along, everything feels fine—and then bam, your check engine light comes on. A quick scan reveals the dreaded PO430 code. Now what? Don’t panic! At Wayside Garage, we see this code all the time, and it doesn’t always mean your catalytic converter needs replacing (but sometimes it does 😬). Let’s break it down. 🔍 What Is Code PO430? PO430: Catalyst System Efficiency Below Threshold (Bank 2) This means your vehicle's computer has detected that the catalytic converter on one side of the engine (Bank 2) isn’t working as efficiently as it should. In simple terms: it’s not cleaning up the exhaust gases properly ... read more