KISS Diagnostics Catalyst & Secondary Air Systems Pack: 3 Cheat Sheets (HTML + Printer-Friendly PDF)

Before you sell a customer a catalyst, rule out everything that kills one. 3 cheat sheets for catalyst efficiency and secondary air injection, built to make you check misfires, fuel trims, O2 sensor behaviour and exhaust leaks first. Written by a licensed technician with 20 plus years in the bay.

WHAT'S INSIDE (3 sheets)

• P0420 Catalyst System Efficiency Below Threshold, Bank 1

• P0430 Catalyst System Efficiency Below Threshold, Bank 2

• P0410 Secondary Air Injection System Malfunction

ON EVERY SHEET: step-by-step diagnostic flowchart · most common causes ranked by estimated likelihood · professional tips · reference table of normal vs failed readings · related codes · safety warnings. 2 of the 3 sheets also include a waveform reference showing a normal and a faulty signal pattern.

HOW YOU GET IT: one zip, instant download after payment. Every sheet comes in two formats: HTML (any browser, phone, tablet or computer) and a printer-friendly PDF. Generic SAE codes that apply across makes. Prices in USD. Digital product, all sales final (see FAQ).