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

-------------------------------------------------------------------------------
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!

 

I bet it's just a big leak. Have you checked under the hood at all?

 

yes i have and i see nothing obvious

 

your purge valve is stuck open causing both faults, above the air filter housing there is only 1 solenoid valve there. canister is back of car under the trunk. remove the 3 13mm nuts and drop plastic cover, you'll see it. when you replace those parts blow the line for the purge valve. the carbon broke up causing purge issue & carbon is most likly causing purge valve to fail. you can pinch off before purge valve and run test to verfy 1 fault goes away.

 

Purge valve is an easy fix, 20 min.s w/ the new valve...

 

What can I use to blow the line?
What do you mean by pinch off before purge valve?

So you guys are thinking the n80 valve is causing both fault codes?

 

And pinch off? >> hose is flexible at the valve...