KISS Diagnostics EGR (Exhaust Gas Recirculation) Pack: 8 Diagnostic (HTML + Printer-Friendly PDF)

A clogged passage, a sticking valve, a bad position sensor or a wiring fault can all set the same EGR code. 8 cheat sheets that tell you which test comes next, so you stop replacing valves that were never the problem. Written by a licensed technician with 20 plus years in the bay.

WHAT'S INSIDE (8 sheets)

• EGR insufficient flow detected: P0401

• EGR control circuit malfunction and range / performance: P0403, P0404

• EGR sensor A circuit low and high: P0405, P0406

• EGR sensor B circuit low and high: P0407, P0408

• EGR sensor A circuit: P0409

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. All 8 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).