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My Fleet Manage every car you own or work on Trouble codes Every code, with causes and fixes Diagnose Describe the fault in your own words Fixes What actually solves a fault, and how hard it is VIN decoder Read the number on the windscreen Vehicles Models, generations and specs Engines Families, and the cars each was fitted to Transmissions Gearboxes, and what goes wrong with each Community Write-ups, questions and confirmed fixes Articles How each system works, and what goes wrong Browse the reference Systems, symptoms, causes, makes OBD-II service modes Live values to check a code against CAN bus databases Signals mirrored from opendbc

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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.