A trouble code is an alphanumeric value that corresponds to a particular type of fault. The list was originally created by the Society of Automotive Engineers (SAE) for use by all vehicle manufacturers who have to comply with OBD II emissions regulations in the U.S. The same list of basic codes have also been adopted by European and Asian auto makers. The list of trouble codes is subdivided into four basic categories, click on any of the codes to see the full list of codes:

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