The article shows the reason why digiprog 3 "no connection" error. The details of digiprog 3 at http://www.careucar.com/wholesale/best-price-digiprog-3-Digiprog-3-odometer-programmer-v4-82.html.

1. Solution for Digiprog 3 no connection
One customer said his digiprog 3 has a error that "NO CONNECTION", as the
following pics. And he tried to use it to test a few different Audi A4 and A6, also
happen no connection, how to solve the error?

2. As the above pics, the customer did the car with obd2 diagnostic interface, however,
the cars before 2008 could not be diagnosed with obd2 interface. For this, view
digiprog 3 user manual.