OBD2 codes

Every Honda code guide — type to filter by code or symptom.

⬇ Free Honda code cheat sheet (PDF)The codes Honda owners see most on one printable page — print it and keep it in the glove box.

P0171System Too Lean P0300Random / Multiple Cylinder Misfire P0420P0420 Honda: Causes, Diagnosis & Whether You Can Drive P0430Catalyst Efficiency Bank 2 P0455Large EVAP Leak — Causes & Fix P0456Small EVAP Leak — Causes & Fix P0457EVAP Leak (Loose Fuel Cap) — Fix P1457EVAP Leak P3400VCM Cylinder Deactivation