Had this strange fault code on my scans recently which seems to reappear next time I scan after clearing but can’t seem to find anything to indicate what it means!

the car is under warranty until September and having its first MOT on Tuesday morning (not at the dealers though).

Everything on the car seems to be working, running genuine VCDS Hex-V2 up to date.

 

Address 08: Auto HVAC (E87)       Labels:| 3V0-907-044.clb

   Part No SW: 3V0 907 044 CS    HW: 3V0 907 044 CS

   Component: AC Automat    H34 4402  

   Revision: 20K10000    Serial number: 00000B00782331

   Coding: 1111000400211001100500400010102A

   Shop #: WSC 33361 790 00158

   ASAM Dataset: EV_ACClimaPrehVW37X 002025

   ROD: EV_ACClimaPrehVW37X_002_VW37.rod

   VCID: 074B9F4FEFADA893328-8052

 

   Humidity sensor: exterior: 

 

   Rear A/C control head: 

 

1 Fault Found:

1048835 - Functionality limited due to Engine Control Module 

          P1719 00 [008] - -

          [PTC-Reduzierung durch MSG]

          Intermittent - Confirmed - Tested Since Memory Clear

             Freeze Frame:

                    Fault Status: 00000001

                    Fault Priority: 6

                    Fault Frequency: 13

                    Reset counter: 21

                    Mileage: 38915 km

                    Date: 2020.12.28

                    Time: 07:52:01

 

                    Voltage terminal 30: 14.4 V

                    Auxiliary heater: in stages-Enabling for auxiliary heater operation: Enabling stage 1

                    Auxiliary heater: in stages-Act.val.: 1

                    Auxiliary heater: in stages-Target value: 3

                    Auxiliary heater: in stages-Specified value for control: 3

 

Any clues?

I would’ve phoned the dealer already but they’re 25 miles away from me and with all the COVID hassles at the moment it’s not that easy for me to take the car to them and leave it there to check (as opposed to being able to wait in the showroom like normal times....)

Nothing to worry about based on this thread: https://forums.ross-tech.com/index.php?threads/18048/

 

There might be a firmware update for the ECU or HVAC panel that fixes it. You'll have to get your dealer to check or buy an hour on erwin to check the TPI/TSB's for anything obvious

So is this just indicating the load on the alternator / battery is a bit high and it’s trying to shut off this auxiliary heater then?

I do have a subwoofer and amp fitted so it’s possible there is a bigger draw than the car is expecting but everything is working fine, start stop still operates sometimes though since the weather has got cold it’s not that often (I guess this is normal behaviour though?)

More or less my understanding, if it's your only fault code I'd probably ignore it

The aux. heater is one of the biggest consumers on the car, while its on, at least on my car, the revs rise to 1K as if it were doing a regen, so its probably the first to go if power is short.

 

If you take it to the dealers with a power issue and there are aftermarket items fitted they will likely tell you that is the issue regardless.