Direwulff

My HVAC system seems to be running fine, but I keep getting the same fault code come up as soon as I run a scan. I did notice a few times last summer the passenger side vents would blow warm air while the driver side vents blew cold air, usually after a cold start but not always, even though the HVAC settings were the same for both passengers. Anyone have this fault code diagnosed before? btw my car is a 2011 A8 swb 4.2 with 73,000 miles, live in the upper midwest.

Address 08: Auto HVAC (J255) Labels: 4H0-820-043.clb
Part No SW: 4H0 820 043 E HW: 4H0 820 043 E
Component: Klima 4 Zonen H14 0063
Coding: 4801207E8C
Shop #:
ASAM Dataset: EV_AirCondiFront 001050
ROD: EV_AirCondiFront_001_AU64.rod
VCID:
1 Fault Found:
0378 - Coolant Circulation Pump
B10D0 04 [009] - Internal System Fault
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 3
Fault Frequency: 1
Reset counter: 147
Mileage: 118148 km
Date: 2018.04.11
Time: 11:46:46

supernaus

Dit you get it resolved?

Albert_Swafega

I had this a while back, here is a little guide how to repair

Word Doc

Albert

ppinto1

I don't remember if this was my code; but if it's the pump on the cowl side of the firewall, the dealer wanted $600 to change it.

supernaus

Thx for al the reaction I noticed later this is for the A8. I need a solution for the A6 C7 model.

john6205

I have the same problem described in this thread. No heat intermittently this past winter, and now no heat period. My vehicle is a 2013 Audi A8L w/ the 4.0t engine.

Here is my code scan from VCDS:
1 Fault Found:
0378 - Coolant Circulation Pump
B10D0 04 [009] - Internal System Fault

Per the suggestions from this and other threads, I changed the pump located by the fire wall (I used a new "replacement" pump purchased from Ebay $33), and still get the same code. No heat either. After a little more research, I discovered an identical pump down by the Aux radiator in front of the drivers side wheel well. Thinking that was the problem, I purchased and changed that pump (again, I used a new "replacement" pump purchased from Ebay $33) and again get the same code. No heat at all yet. I am out of ideas, and am hoping that there is another avenue to troubleshoot, because I need a direction, other than taking it to the dealer....