the car has two aux pumps one for helping cooling and one going to heater core and also for cooling, i know this because i just paid too much money to fix both and i am very aware of what each does now lol
7
aux pump issue
- Thread starter Judas
- Start date
hey fyi our cars have two aux pumps lol
jimlloyd40
Autocross Champion
- Location
- Phoenix
- Car(s)
- 2018 SE DSG
Why is there an aux pump for the heater core? What purpose would it have?
Yeah I dunno, push hot coolant thru the core? It's about the same size as the other aux pump, how many electric pumps do we need lol
In obdeleven it kept showing two electric pumps in long coding, and initially I thought it was wrong
Most cars aux pump is to support the heater core, it's weird that ours has two aux pump s , one to support cooling and one to support heater core and cooling
Gr33nBunny
Drag Racing Champion
- Location
- 610-SePa
- Car(s)
- 18 GTI SE 6mt
Gr33nBunny
Drag Racing Champion
- Location
- 610-SePa
- Car(s)
- 18 GTI SE 6mt
Under the intake manifold, on the left hand side near the oil filter area I believe, but I could be wrong. I dont really know either lol
BudgetPhoenix
Autocross Champion
- Location
- Kansas
- Car(s)
- 2016 GTI S DSG
Sorry to bump old thread has anyone changed that aux pump ^?
copying from other thread:
I pulled a p16C700 code in the engine module yesterday just by scanning... no CEL. Its for "Heater Support Pump - locked out" Not a ton of info out there for 2.0Ts on this mostly for TDIs in Europe and a few posts around here without much resolution or help. Its for one of the two auxillary coolant pumps, I assumed it was for the one that helps cool the turbo after shutting the car off. Apparently there's one under the oil filter housing area and one just below the turbo. I got the car up in the air and pulled off the axle heat shield and disconnected the sensor and messed around with clearing the codes and doing the heater support pump output test while connecting and disconnecting it with the ignition on. The old code dissapeared and I got a static one when disconnected so I figured the one below the turbo is my problem one. I then tried tapping on the aux pump with a wrench while running the heater support pump output test and it started working again I could feel it and hear the noise change. Idk why it would have been stuck before. Hopefully that fixes it for now it doesn't look like a fun part to change. Im guessing passenger axle will have to come out.
copying from other thread:
I pulled a p16C700 code in the engine module yesterday just by scanning... no CEL. Its for "Heater Support Pump - locked out" Not a ton of info out there for 2.0Ts on this mostly for TDIs in Europe and a few posts around here without much resolution or help. Its for one of the two auxillary coolant pumps, I assumed it was for the one that helps cool the turbo after shutting the car off. Apparently there's one under the oil filter housing area and one just below the turbo. I got the car up in the air and pulled off the axle heat shield and disconnected the sensor and messed around with clearing the codes and doing the heater support pump output test while connecting and disconnecting it with the ignition on. The old code dissapeared and I got a static one when disconnected so I figured the one below the turbo is my problem one. I then tried tapping on the aux pump with a wrench while running the heater support pump output test and it started working again I could feel it and hear the noise change. Idk why it would have been stuck before. Hopefully that fixes it for now it doesn't look like a fun part to change. Im guessing passenger axle will have to come out.
BudgetPhoenix
Autocross Champion
- Location
- Kansas
- Car(s)
- 2016 GTI S DSG
Thanks I found that section in the manuals. The two pictures right before that were confusing me I lol. I didn't realize that's the hot side charged air piping which it says to remove first also. The manual doesn't say to disconnect the axle but its shown as not connected in the pic. It would make it a hell of a lot easier thats for sure. There basically no way to reach anything from the botton besides the electrical connector with it in the way.
I duno I just replaced the WG actuator just removing the axel heat shield.. the Aux pump is right below the turbo.
BudgetPhoenix
Autocross Champion
- Location
- Kansas
- Car(s)
- 2016 GTI S DSG
Doesn't sound fun lol. I removed the axle heat shield earlier on jackstands and felt like there was no room to work with it.
BudgetPhoenix
Autocross Champion
- Location
- Kansas
- Car(s)
- 2016 GTI S DSG
Which code did you get for your aux pump btw? Did you get a CEL?