Hacker News new | ask | show | jobs
by vel0city 31 days ago
I've had a few cars fail emissions over the years and it was never because of the vapor. It was normally P0420 codes that weren't resolved from O2 sensors and other attempted fixes on 20 year old Hondas. Or fouled EGR airflow spaces needing cleaning. Or EGR/manifold baffles that would get stuck.