Thanks Marc for you continued help, I appreciate it.GiveMeABreak wrote: ↑13 Apr 2020, 16:56Are you actually getting a choice? This is unusual - as Diagbox will normally load up automatically for the appropriate car without a choice. The only choices it usually gives you is for earlier cars where you can select Lexia or 'Scantool' which is the basic OBD reader.
It should not take anywhere 5 minutes to read the ECUs on a C4 - so it is obviously having some trouble communicating somewhere along the line. Economy Mode shouldn't affect the testing - but to rule this out, start the engine and run the diagnostics again with the engine running.
If in fact you are given a choice of Diagbox - try selecting that instead.
Yes, choice of Diagbox or Lexia 3 though unsure of what menu I need to select for an ABS bleed or whether it has that functionality...