Knowledge that outlives the forums.
Hondabase is a community-driven, open-source knowledgebase for Honda and Acura vehicles - from routine maintenance to deep ECU work. Every article and image is preserved on GitHub, so nothing is lost when a forum or image host goes dark.
The article knowledgebase is being built now. In the meantime, explore the tools and the recovered PGM-FI wiki below.
Explore
Knowledgebase: Electronics
ECU, sensors, injectors and ignition. The first articles, ported from the wiki.
/cars/electronicsPGM-FI Wiki
Recovered grassroots Honda ECU & tuning knowledge - hundreds of technical articles.
/pgmfi/wikiFiles Archive
Legacy Honda documents, ECU ROMs, schematics, STLs and more - community-curated.
files.hondabase.com ↗Error Codes
Look up and understand Honda OBD0, OBD1 and OBD2 diagnostic trouble codes.
/reference/error-codesWire a Wideband
Step-by-step guide to wiring a wideband O₂ sensor to a Honda OBD1 ECU.
/guidesECU Pinouts
OBD0/OBD1/OBD2 ECU pinout diagrams (OBD1 available now).
ecu-pinouts.hondabase.com ↗ECU Components
Detailed OBD0 and OBD1 ECU component reference.
ecu-components.hondabase.com ↗VIN Decoder
Decode Honda Vehicle Identification and chassis numbers.
vin.hondabase.com ↗PGM-FI Forum
Archived grassroots ECU development forum threads, searchable.
/pgmfi/forumWhy Hondabase
- Preserved forever. Articles & images live in public GitHub repos - anyone can fork and rehost the whole site.
- Community-driven. Contribute through a friendly editor; every change is reviewed before publishing.
- Chassis-accurate. Built around chassis codes (EK, EG, CL9, CM6…) so platform-shared knowledge is shared, not duplicated.
- Open & ad-free. No trackers selling your data, no intrusive ads.
Join In
Discussion, troubleshooting and development happen on Discord; code and content live on GitHub at github.com/Hondabase.
Join the Discord →