Hey guys
Need some help. New Audi S5 owner here (2008, 4.2 V8, 110K, FASH). Love the car but having trouble with vehicle emission light coming on within 3 days of having it.
Error codes are showing as
P0421 Warm Up Catalyst Efficiency Below Threshold (bank1)
P0431 Warm Up Catalyst Efficiency Below Threshold (bank2)
The dealer had a new mot put on it before I picked it up, it was mot'd with a local garage.
After having the error codes, I took the car to an Audi specialist who said the sensors are all fine and basically both cats are knackered and quoted roughly £1500 parts and 15 hours labour for both banks.
I informed the dealer who sold me it and he wanted the garage who mot'd it to take a 2nd look as it passed emissons during mot test literally a few weeks earlier.
They done further emissions tests on each cat which they say passed, im told the dealer then sent an audi technician who apparently said the cats are functioning ok. Its due a service in 3 months and they suggested changing the spark plugs then to see if that helps.
With conflicting information im really confused. The car feels and drives fine. No history of a carbon clean.
Can anyone give any advise? Anyone had something similar happen before?
Thanks
Talbius
Need some help. New Audi S5 owner here (2008, 4.2 V8, 110K, FASH). Love the car but having trouble with vehicle emission light coming on within 3 days of having it.
Error codes are showing as
P0421 Warm Up Catalyst Efficiency Below Threshold (bank1)
P0431 Warm Up Catalyst Efficiency Below Threshold (bank2)
The dealer had a new mot put on it before I picked it up, it was mot'd with a local garage.
After having the error codes, I took the car to an Audi specialist who said the sensors are all fine and basically both cats are knackered and quoted roughly £1500 parts and 15 hours labour for both banks.
I informed the dealer who sold me it and he wanted the garage who mot'd it to take a 2nd look as it passed emissons during mot test literally a few weeks earlier.
They done further emissions tests on each cat which they say passed, im told the dealer then sent an audi technician who apparently said the cats are functioning ok. Its due a service in 3 months and they suggested changing the spark plugs then to see if that helps.
With conflicting information im really confused. The car feels and drives fine. No history of a carbon clean.
Can anyone give any advise? Anyone had something similar happen before?
Thanks
Talbius
