Guides

What’s worth knowing before you plug anything in, without the jargon. It applies to Final OBD and, mostly, to any other diagnostics app.

• Which OBD2 adapter to buy for your phone

  Cheap ELM327, vLinker or OBDLink: when each one is enough and which work with iPhone.

• How to read and clear your car’s fault codes

  Step by step, what each code means and when it makes sense to clear.

• The Spanish ITV and the OBD socket: what they read

  What the Spanish test centre reads through the OBD socket, what counts as major and how to avoid surprises.