Yes, so did I. All the dci's I have had have the code AAAAAA in the ecu for all four injectors. Looking at the injectors I have not been able to find a six figure code on them. Trying to use any code that I thought was correct in programming tells me that it is the wrong code! So I gave up.
The code wasn't one of the figures on the top next to the leak-off point. It was on the side in light grey lettering IIRC, just below the 'cap', say about 50mm down. However, if the ECU had an 'AAAAAA' code in all positions, that suggests it never had any codes previously so probably doesn't require them.
Roy