on April 11, 2009, 3:21 pm, in reply to "Audi A3 - EPC Light and Fault code PO601"
I believe your instinct is correct and that a software update is required. We've had the same issue on an Octavia RS and a Golf GTI recently and both were resolved with an update. Check it out with an Audi dealer.
Only query I would have is has been been remapped/chipped as P0601 can sometimes follow on from that.
Gerard
Message Thread 
Audi A3 2.0 FSi 2005 - EPC light on, fault code PO601 # - Pete Mutlow April 11, 2009, 3:04 pm
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