1999 Audi A6 Quattro Automatic 100k miles P0441 P0455 Check Engine Light?

I been trying to attack this problem for a while.

VAG-COM Version: Release 409.1-S


Chassis Type: 4B - Audi A6 C5
Scan: 01,02,03,08,15,16,17,35,36,37,45,55,56,76

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Address 01: Engine
Controller: 4D0 907 551 AH
Component: 2.8L V6/5V MOTR AT D03
Coding: 06252
Shop #: WSC 02325
2 Faults Found:
16825 - EVAP Emission Control Sys: Incorrect Flow
P0441 - 35-00 - -
16839 - EVAP System: Large Leak Detected
P0455 - 35-00 - -
Readiness: 0000 0100

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Address 02: Auto Trans
Controller: 4B0 927 156 G
Component: AG5 01V 2.8l5V USA 8509
Coding: 00000
Shop #: WSC 00000
1 Fault Found:
00526 - Brake Light Switch-F
27-00 - Implausible Signal

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Address 08: Auto HVAC
Controller: 4B0 820 043 Q
Component: A6-
Note: Excessive Comm Errors



For the CEL it keeps coming back everytime i erase it after 2-3 trips. I tried a new gas cap but that didnt help. After reading previous posts it might be related to the N80 valve.

I have a VAG-Com and AllData. All Data gives instructions for N80 valve using VAG 1551 or VAG 1552 would the same numbers and measuring block apply for using a VAG Com ?

Can anyone give any other suggestions about these error codes or what else to check and test?

Also can someone point me to where the Canister Purge Solenoid N115 and or what it looks like also where the

Evaporative Emission Control Canister is and what it looks like.

Thanks!