CrankKey.
Look up any code. See what it can indicate.
Look up any OBD-II code. Find the fix. No adapter required — the pocket reference for P, B, C, and U codes built for DIY drivers. Type the code your car threw, get a plain-English breakdown of the likely cause, the parts usually behind it, and a shop's honest quote — ranked by how often each fix actually works.
Suggestions appear as you type. Use the arrow keys to move, Enter to select a highlighted suggestion, Escape to close suggestions, or Enter with no selection to look up the typed code.
Accepted examples: P0420, B0010, C0085, or U0100. P-code lookup supports P0001–P3000.
A code is a starting point, not a diagnosis; confirm the cause with vehicle-specific testing.
OBD-II coverage boundary
U.S. light-duty gasoline vehicles have OBD-II requirements beginning with model year 1996, and light-duty diesel vehicles beginning with model year 1997. Those regulatory boundaries describe what vehicles must implement; they are not a CrankKey support or compatibility guarantee.
CrankKey has no blanket make/model/year hardware coverage claim. CrankKey-verified vehicle-specific support is limited to the dated evidence and code paths identified in the diagnostic coverage record; external benchmarks and synthetic fixtures are not CrankKey evidence.
Wireless scanner buyer help
Go beyond the engine computer.
Compare manufacturer-documented wireless scanner coverage, compatibility limits, and evidence before you buy. Innova 1000 names ABS, SRS, transmission, and body systems through specific examples; confirm your vehicle’s year, make, model, region, and configuration. Those named body examples are not every body module.
Preview a handful of published guides across the P, B, C, and U OBD-II families.
Feedback or a missing code