Hi guys, what is the purpose of the coolant pump B?

I have a light on and have had it scanned and the code is manufacture control p261a

My issue is the heating blows hot and cold and just wondered if this pump could have something to do with it.

Thanks for any help in advance 

My understanding is that the coolant pump B, is a secondary pump to keep the water circulating through the turbo when it is hot and the engine has been switched off. It is electrical and sometimes runs when the engine is turned off to cool the turbo down.

 

If your heating blows hot and cold you might want to check the temperature gauge . I had a similar problem where the temperature gauge would suddenly drop after being at 90 for sometime. This problem was related to a faulty DSG thermostat, which would stick open. 

Coolant thermostat for DSG gearbox oil cooler.

Škoda catalog no:

1K0121113A

Suitable for:

 

Škoda Superb 2

1.8 TSI 112kW/152PS CDAB 03/2009 → 05/2015
1.8 TSI 112kW/152PS 4x4 CDAB 03/2009 → 05/2015
1.8 TSI 118kW/160PS BZB 03/2008 → 05/2009
1.8 TSI 118kW/160PS CDAA 09/2008 → 05/2015
1.8 TSI 118kW/160PS 4x4 CDAA 11/2008 → 05/2015
2.0 TSI 147kW/200PS CCZA 05/2010 → 05/2015
2.0 TDI CR 103kW/140PS CFFB 02/2010 → 05/2015
2.0 TDI CR 103kW/140PS 4x4 CFFB 11/2010 → 05/2015
2.0 TDI CR 103kW/140PS CLJA 02/2010 → 05/2015
2.0 TDI CR 125kW/170PS CFGB 05/2010 → 05/2015
2.0 TDI CR 125kW/170PS 4x4 CFGB 05/2010 → 05/2015

 

 

This is the part number you require, the part costs £23.42  according to my invoice  and the labour time was 2 hours.

 

as I understand the operation of the item; it allows coolant water to pass through the DSG oil cooler and then to the radiator. It normally operates if the DSG oil reaches a certain temperature and effectively cools it down. What happens if it is faulty, is that water is constantly allowed to go through the DSG oil cooler and to the radiator. The end result is that water is always passing through the car radiator even though the correct engine operating temperature has not been reached. This means that the main water thermostat is by-passed.

 

My DSG thermostat appeared to stick open sometimes when running, or remain open, resulting in the problems described.

 

 

Many thanks for that information, i never notice the temperature gauge drop it seems to stay constant 90.I will have a look before a replace the coolant pump, strange having this pump but it obviously there for a reason.

Thanks again for your information