About us

OBDoktor is an independent resource for drivers, DIY mechanics and workshops who need clear answers when a fault code appears. We focus on what actually fails in practice — not just the textbook definition of a code.

How we write our guides

• Causes are ranked by how often they turn out to be the real fault.
• Diagnostic steps include real measuring values, connector pins and VCDS / OBDeleven live data where available.
• Part numbers are checked against manufacturer catalogues, including revision letters.
• Every guide shows the date it was last reviewed.

Independence

We are not affiliated with Volkswagen AG, BMW AG, Mercedes-Benz Group, Stellantis, General Motors, Ross-Tech or Voltas IT. Brand names are used for identification only. The site is funded by advertising and affiliate links, which never influence our diagnosis.