Fault Code: 16804 P0420 035
Catalyst System, Bank1
Efficency Below Threshold
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Interesting day! They pulled the exhaust out, stuck a camera up both ends but couldn’t see anything wrong with the CAT. They checked both sensors – both seemed ok.
The only thing they could think of was the air-filter (after market), so they suggested that the standard VW one was fitted, and "see how it goes" (they couldn’t recreate the problem after they reset the error).
So I went home after being there for 5 hours with a VW airbox & filter (engine is very quiet now) and I guess we’ll see how it goes..
How much for the 5hrs labour and airbox + filter (I didn’t have one)
… Zip, Zero, Nada! I confirmed it with them, and they said "don’t worry about it – give us a call and let us know how it goes"..
Service or WHAT!!!!
visit: www.amdtechnik.co.uk (they’re great!!)