What's New

What changed, and when

New makes, new guides and fixes for this hub. Newest first.

This page, and a link to the site owner tools

September 29, 2026

What's new now lists every change to this hub with dates. The footer also links the free tools for site owners: the embeddable lookup box and the complete code list as CSV and JSON. See it.

Ford EEC-IV codes opened

September 25, 2026

The hub now covers Ford as well as GM: 82 EEC-IV self-test codes with the key on engine off test, the running test, code 11 as the pass marker, and continuous memory codes.

Code reading guide

September 25, 2026

How to read OBD-I codes without a scanner: the paperclip method, counting flashes, what code 12 means on GM, and clearing codes after the fix.

Breadcrumbs and clearer navigation

September 20, 2026

Every code page shows its path back: Home, then the make, then the code, with the make clickable.

The hub opened with GM

September 19, 2026

68 GM two-digit codes covering Chevrolet, GMC, Buick, Cadillac, Pontiac and Oldsmobile from 1982 to 1995, with the ALDL paperclip procedure on every make page.

Make pages and a browse row

September 19, 2026

Each make got its own landing page with the retrieval steps, and the header carries a make row plus a code lookup from every page.

Live makes

GM and Ford are covered today. Chrysler, Toyota and Honda pages are in the works.