Observed arrival · 2026-11-15
OBD2DTC: A check-engine-light codebook with owner complaints
A reference for generic OBD-II trouble codes that explains likely causes and symptoms, with make-specific pages adding complaint data by model.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Drivers decoding check-engine-light scan results
- Worth noticing
- The homepage labels its complaint rankings as NHTSA data and identifies coverage across six US-market brands and model years 2012–2025.
Field notes
The homepage groups generic codes by system—powertrain, body, chassis, and network—and gives a short explanation of how the first characters work, using P0301 as a cylinder-one misfire example. Its complaint table attributes rankings to NHTSA and lists counts such as 216 for P0302 and 186 for P0420. The source notes identify OBDex as CC0 and NHTSA complaints as public domain; several make-specific sites are marked as opening soon.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
One card from the complete issue