P26f4 ошибка ваг

Yesterday the engine light popped in so I scanned with the ODB2 reader as I was away from the house.
It’s a 2015 Passat TDI with the diesel gate updates all done.
These 2 errors popped up and I can’t seem to find much about them.
Any ideas?

P26F7
P26F4

I did find on a site this detail:
P26F7 Coolant Pump “C” Supply Voltage Circuit
P26F4 Coolant Pump “C” Control Circuit/Open

I don’t notice any performance changes. I cleared them and they do reappear after I turn the car off and then on again. I think twice it popped up as I was driving.
I’d like to know what coolant pump C is and where it is on the vehicle.
I’m assuming front end down low maybe?
Any help would be greatly appreciated!
Thank you.

I don’t know where «coolant pump C» or what to do about these codes. But, if it was my car, I would be diligent about watching the engine temperature gauge while driving for any signs of overheating and shut it down if the needle goes past the «normal» mark at 12 oclock on the guage. There have been several posts about 2015 models with coolant pump failures, which can lead to catastrophic overheating.

If you car is still under warranty take it to the dealer right away.

Here is a snapshot of the error reported. Interestingly enough, it did not pull the P26F4 code that was also being detected off and on by the OBD2 scanner. They are highly related so I suspect the pump is done but am looking to know where it is in the vehicle and what the part number would be if it is not covered under warranty. Taking it into the dealer this morning to see if they can look at it or better yet tell me if it’s a warrantied part.
Thanks again for any help!

1 Fault Found:
28389 — Unknown Error Code
P26F7 00 [175] — —
MIL ON — Confirmed — Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 90029 km
Date: 2019.06.29
Time: 15:57:52

Engine speed: 1180.50 /min
Normed load value: 16.1 %
Vehicle speed: 69 km/h
Coolant temperature: 90 °C
Intake air temperature: 56 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 14.220 V
Unlearning counter according OBD: 40
Heater support pump 1 bank 1 second.circuit: activat.: 93.56 %
Extern.temp.sens.1 bank 1: raw value: 15.5 °C
Shut-off timer: last engine shut-off time: 554 s

Readiness: 1 1 0 1 0

Remember there is a coolant pump for the radiator for the intercooler which I believe is electric only, I think if you don’t hit high CAIT the pump wont run, and you won’t notice any degraded performance until you hit the CAIT temp threshold, prob around 300F.

If it’s the coolant pump, it should be covered.

Thanks 740GLE! I’m hoping it’s covered obviously, the car has been fantastic otherwise since they replaced the AdBlue line that was leaking when I purchased the vehicle.
I’m quite happy with the car for sure

if anyone else knows the approximate location of this coolant pump, I’d like to crawl under the car and make sure it’s simply not a loose connection etc. We’ve had plenty of rain this weekend and perhaps it’s just been soaked or disconnected somehow even

ask and you shall recieve.

Remember this pump’s wiring loom is usually disconnected and moved out of the way to gain clean access to the oil filter. Maybe the shop doesn’t do that step and just lets oil fall and get all over the loom and now it’s into the connector? just a guess.

Some more insight from the self learning docutment. V488 is EGR cooler/cabin heat coolant pump.

teamwork!

VW dealer probably would have replaced the pump, you know just for good measure

Thank you all for your help and input, I was finally able to throw the car up on the ramps and remove the belly pan. I checked the front pump first (V188 I believe it is). The connector essentially slid right off when I pulled on it, which I found weird as almost every other VW connection you need to press a tab, lift a lock pin or squeeze it somehow lol.
So I sprayed some electrical contact cleaner on both connections and pushed it back on.
It wasn’t «clicking» into place so I did it again. The 3rd time, it clicked into position and the pump actually kicked in and was whining very faintly (this is with the vehicle turned off).

I believe this issue was simply a connection that was not fastened fully after the last oil change. As someone eluded to earlier, it’s possible the loom was moved when removing the filter. I believe that was it. So I cleared the codes and CEL hasn’t popped back up yet so I think it’s all good.
The front pump was relatively clean with no oil/grime on it. The rear pump was very oily, albeit the connection was solid and seemed okay.

For future reference, the front (V188) and rear (V488) pumps are identical part numbers:
BOSCH 5G0 965 567

Thanks to everyone for their help!

Hello, I see it’s an old post but was your coolant pump all good since this fix? I have changed mine recently after a Supply Voltage Circuit error and I still get the error even though I can hear the pump running when I plug it in, do you have any idea if it could be a supply cable problem? the one that gets in the pump

Hi I have the same issue , were you able to fix yours?. And can you guide me because I have the same codes showing but the pump is working

yeah, check the second pump it s the same, only the fitting way is different