A dealer will often charge you over £100 for a simple 'diagnostic check'. Worse, they sometimes refuse to give you the printed report with the precise error codes, providing only a generic quote for a replacement part.
The Consumer's Weapon: OBD2
Today, for less than £25, you can buy a Bluetooth OBD2 reader (like ELM327) and use free smartphone apps like *Car Scanner* or *Torque*. This allows you to read the fault code yourself (e.g., P20E8 or C111204) before even going to the garage.
Why it's vital for your case
Having a screenshot of the error code generated by your own vehicle protects you against opaque diagnostics. It is the first step in building a solid case to prove a manufacturing defect. Please attach these screenshots to our registry form.
Are you affected by this problem?
Join the national registry to defend your rights under the warranty of hidden defects (Art. 1641).
Register my case