wenmar_codes

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Generic OBD-II trouble codes, described in Wenmar Open's own words: a title, what the code means, common causes, first checks, the components it concerns and related codes. Only codes every maker uses the same way are described (P0, P2, P3400 and up, B0, C0, U0, U3). Manufacturer-specific codes are not described. action=get takes `code`, such as "P0420", and gives its description. action=search lists the described codes by code, narrowed by `query` (text in the code, title or meaning) and `system` (powertrain, body, chassis, network, or an area such as powertrain/emissions); pass `next_cursor` back as `cursor`. action=vehicle takes `id`, a vehicle id such as "2018_ford_f-150", and `code`, any code, a manufacturer-specific one included: it gives the description (null when there is none), the bulletins of that model year whose NHTSA summary names the code, and the bulletins and recalls of that model year about the same components. A part of that answer is null where the data is not held. A description is general and is not a diagnosis; a bulletin or recall listed may apply to the model year and is not confirmed for one vehicle.