Tested variable valve timing solenoid. Resistance ok and solenoid were clicking when voltage applied . Duty cycles were the same.
Swapped inlet solenoids and checked waveforms and codes and fault moved to bank 1.
Replaced solenoid, tested and ok.
Hope this might help someone
Joe
Message Thread 
Audi A4 3.2 FSi 2007 - Code P0346 bank 2 implausible signal - Fixed # - Joe O'Farrell September 18, 2016, 6:27 pm
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