Heater support pump - open circuit - cjxc

Ken Adams

Active Member
Apr 13, 2023
22
22
Hi guys,

I keep getting - P16C100 fault code and I would like to replace the auxiliary water pump.

My question is, has anyone here replaced this pump? If yes, how difficult it was?

Cupra 300 CJXC
 
Feb 4, 2025
1
0
How did you get on with this, think I have the same problem with my 2017 Leon. Amber engine management light coming up with obd showing same fault code
 

Compo1

Active Member
Jul 19, 2010
329
87
How did you get on with this, think I have the same problem with my 2017 Leon. Amber engine management light coming up with obd showing same fault code
Check the pump under the Oil filter housing this code can also refer to that pump as well as the one behind the sump on the drivers side.

I common problem with the one under the oil filter is snapped wires they get brittle with the heat and mechanics sliding the oil filter bowl by them.
 
  • Like
Reactions: DEAN0 and Seamusn1

DEAN0

Old Git
Feb 1, 2006
5,439
1
424
Preston - UK
Check the pump under the Oil filter housing this code can also refer to that pump as well as the one behind the sump on the drivers side.

I common problem with the one under the oil filter is snapped wires they get brittle with the heat and mechanics sliding the oil filter bowl by them.
Exactly what happened to my sons 184TDi - snapped wires due to forcing the filter passed them.
You can get a repair part off ebay - it is a plug with appx 150mm of wires attached.

By using the full 150mm of wire on the end of the car loom - it allows you to move them completely out of the way of oil filter changes.
 
  • Like
Reactions: Compo1
Lecatona HPFP (High-pressure Fuel Pump Upgrades)