No need to swap injectors, fault code is for injector electrical malfunction. Get out multimeter and test injector resistance. Not sure what it is supposed to be on 8 but somewhere 10-30 ohm should be OK, you can always compare resistance to another injector. If the injector reads OK check wiring between injector and ECU. Faulty injector or wiring will cause all of those fault codes apart from the top one.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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