What's New
What changed, and when
New codes, new guides, new tools and fixes to this site. Newest first.
Free code data, and reference pages you can print
September 29, 2026
The whole generic code list is downloadable as CSV or JSON, all 9,415 codes, free including commercial use. Two new reference pages went up with it: the OBD-II connector pinout and how a code is built. Everything here prints on one sheet. See it.
The embed box now matches your site
September 29, 2026
The free lookup box carries no styling of its own. It inherits your page font and takes your form CSS, so it looks like your own search box rather than like an advert. It also opens the lookup in a new tab, so you do not lose the reader. See it.
150 more codes and six new guides
September 26, 2026
Honda, Ford and Chevy each gained 50 codes. Six guides followed: Honda misfire codes and ABS and VSA lights, Ford PATS no-start and ABS and traction, Chevy security relearn and ABS and Stabilitrak.
Ford flash codes opened on the OBD-I hub
September 25, 2026
The pre-1996 hub now covers Ford EEC-IV as well as GM, 82 two-digit self-test codes with the key on engine off and running test procedures. See it.
Toyota grew by 98 codes
September 25, 2026
Toyota went from 198 to 296 codes across three batches, every one traced to a source before it shipped.
Severity now names the lamp that actually lights
September 25, 2026
Body and chassis faults used to say Check Engine Light. Airbag faults now say Airbag Light, brake faults say ABS Light, and the rest say body or chassis warning light, because that is what you see on the dash.
Five guides added across the network
September 25, 2026
How to read OBD-II codes, how to read OBD-I codes without a scanner, Ford fuel and ignition codes, Honda VTC and VTEC codes, and Chevy P1xxx fuel and ignition codes. Code pages that the guides cover now link to them.
Accuracy pass with sources
September 24, 2026
Every Toyota, Honda and Chevy code was checked against public references. Corrections landed on P1077, P1157, P1672, P1221 and B0414, and three Toyota entries came out because no source supported the meaning that was published.
Breadcrumbs on every site
September 20, 2026
Every code page now shows the path back, Home then make then code, with the make clickable on the OBD-I hub.
The OBD-I hub opened
September 19, 2026
A separate site for pre-1996 flash codes started with 68 GM codes, make landing pages, the paperclip procedure and a code reading guide. See it.
Search in the header of every page
September 19, 2026
The lookup moved into the header on all six sites, with a make dropdown so a reader can search the generic catalog or a brand catalog from any page.
Chevy site launched
September 13, 2026
Chevrolet, GMC, Buick and Cadillac codes got their own site, starting at 95 codes and growing from there.
Ford site launched
September 4, 2026
Ford, Lincoln and Mercury codes got their own site, 23 codes on day one and 99 within the same week.
Structured data and crawler access
August 30, 2026
Code pages started carrying breadcrumb, FAQ and article data so search engines can read the page structure, and the robots file opens the door to the major search and AI crawlers.
Stay current
The code catalogs change most weeks. If you watch one page, watch this one. For the raw list as a file, the free CSV and JSON live on the code data page.