Auxillary Pump, but which one?

[believe671]

Anyone have experience with a drive train issue popping up because of these codes:

20A107
20A203

[b_w.]

Check if you can run the bleed procedure. If not pump is probably dead.

[believe671]

TY! I’ll look into the bleed, but which pump to the turbo or inter cooler?

[greysea]

Originally Posted by believe671

TY! I’ll look into the bleed, but which pump to the turbo or inter cooler?

I believe bw is referencing the charge cooler bleeding procedure (low temp side).

There are videos out there on how to perform it with the sequence of things you have to do. At least then you can hear if your pumps start up and the swooshing sound of coolant moving is there.

(Make sure you have a battery tender available as its pretty long from start to finish. Takes about 6-7mins just to start.)

[believe671]

I’m tracking he meant the low side, but he said maybe a faulty electrical auxillary pump. Just checked levels of both reservoirs( both good). I’m just trying to see which one of the electrical water pumps should I be troubleshooting.

Ima try the follwing:

1. Bleed procedure
2. Check grounds of both auxiliary pumps

[N1rve]

Originally Posted by believe671

Any have experience with a drive train issue popping up because of these codes:

20A107
20A203

I would first check and make sure that your intercooler still has coolant. I’ve seen these error codes come up when the intercooler starts leaking and there’s no more coolant in the intercooler.

[believe671]

Update for anyone having similar issues, the electric auxiliary pump fixed the issue.