Had a fault code come up on Skoda Superb 2.0tdi 190bhp 2016. Fault code is :- 6E5DH/28253 undocumented code. Looking on net code is Secondary water pump. Problem is which is secondary pump. Got a picture, wondered is it number 25 or 29. What is common to go. Car running fine but displaying engine fault light on dash. 

Edited 8 April, 20233 yr by ColinD
Edited title

Your picture above looks like this one...

 

1.6ltr TDI

https://www.lllparts.co.uk/catalogs/skoda/CZ/SUP/851/1/121/121032

 

Perhaps you need this one?

2.0ltr TDI - Part 15 is listed as an additional coolant pump

https://www.lllparts.co.uk/catalogs/skoda/CZ/SUP/851/1/121/121034

 

There is a thread where they did have trouble with the additional coolant pump, maybe they might remember and can assist.

 

There are multiple, you’ll need a better diagnostic tool which will pull the additional code data to tell you A/B/C etc then you can start unplugging to see which one shows open circuit