Code Map

DTC Tech Guides

TEST RUN

Bay-ready · not a parts cannon

Paste DTCs.
Get the bay strategy.

Topology map, ordered diagnostic steps, and a tools checklist — built for techs who already know how to wrench. Verify everything against OEM / TSB for the VIN.

Start test run Try P0300 + P0171 demo
9,533 Generic OBD-II codes
2,911+ Manufacturer-specific
8 Full strategy packs
33 Makes in mfr index

How the test run works

  1. 1

    Vehicle + codes

    Year / make / model, then paste P0300, P0171 or any P/B/C/U.

  2. 2

    Strategy pack

    System topology, ordered tests, tools by step, stop / go / verify.

  3. 3

    Tell us what sucks

    This is a free prototype. Feedback from the bay shapes the next build.

Strategy packs live now

Any other catalog code still gets a definition + generic diagnostic workflow. Enhanced P1xxx codes show make-specific hits when you pick a make.

Ready for a greasy-hands check?

Open Code Map

Prototype · not a substitute for OEM service information.