|
|
Post by expresstyrelab on Mar 19, 2021 17:50:05 GMT
So hopefully this is helpful to someone as I could not find a thread on it. I have a 2015 vw gti with a dsg transmission. Why vw had to make everything so complex but anyways. Had a code P19A000 set without check engine light on. I sometimes get another code for coolant thermostat valve stuck open position but pretty sure it is the chinese made water pump housing I installed. To get to the point. I personally was not having much luck finding a way to diagnose code P19A000. But the audi A series with the 1.8t with a dsg were having this issue. So they say the in line coolant electronic valve between the water pump housing and the transmission oil cooler leak internally to the point sometimes it corrodes the wiring harness also. Just joy full.
So I got lucky and this did not happen to me. The valve is located under the turbo outlet pipe on top of the transmission. You will have to remove a bunch of bad or pull it to the side to get to it. First thing to check is the wiring harness at the valve and the plug. Hopefully your not the unlucky bastard that needs to repair the harness. I had to replace the valve. It fixed the problem. I did open up the old one and take pictures. Where the internal wiring goes from the plug to the internal motor, it corroded and lost connection. If someone can explain how to load pictures to the thread I will upload some pictures for everyone to see.
|
|
|
|
Post by dv52 (Australia) on Mar 19, 2021 19:46:10 GMT
expresstyrelab: Hi: yes-please include pictures - i'm interested. To do this, click on "Reply" on the bottom right-side of this post. Then on the new screen, you will see a tile labeled "Add image to post" on the top right side. Click on this and drag image into section shown Don
|
|
|
|
Post by expresstyrelab on Mar 20, 2021 2:14:21 GMT
 
Here are some pictures of the internals of the valve to show the corrosion. Most do not get caught until it seeps through the connector and destroys the plug. You can see the coolant corroded the wiring where the connector goes into the electrical side of the valve. |
|
|
|
Post by gsprenger on Mar 15, 2022 6:45:15 GMT
Very little information about this issue out there, mostly for Audis. I had a P19A100 and P19A200 on my 2015 GTI. Only knew the location of the valve because of expresstyrelab post up here. The best way to have access to the valve is to remove the battery, and fiddle with the boost pipe that goes between turbo and intercooler. The valve part # is 5Q0 906 457, and the newer revision at the time of writing is "K". There are other valves similar to this one, but with a different connector location, which I believe it won't work on this application, as the harness shouldn't be long enough.   |
|
|
|
Post by balooski on Aug 11, 2023 11:17:42 GMT
Is this part number for the MK7 GTI? I have this code after replacing engine oil cooler, water pump, coils, indirect injectors, and full clean of coolant circuit. Car runs perfectly, and transm. coolant valve apears to be working when monitoring in live view with OBDeleven.
I'm thinking, since the engine oil cooler was mixing a bit of oil with coolant, and it took me a while to notice, maybe the oil in cooling system damaged the valve.
|
|
|
|
Post by ganimedes on Aug 12, 2023 16:47:02 GMT
Hello
No, I don't think the problem is in the oil cooler (as you call it), since that oil cooler is a radiator (just like the radiator that cools the coolant), but through which only the oil circulates. engine to cool down; It goes in the lower front next to the larger coolant radiator and next to the intercooler (turbo air cooler for intake).
I am almost sure that the problem in that water pump has been caused by the coolant, most likely it is that you have the G13 Silicat coolant, which with the passage of time and/or mixing with another type of coolant causes those "sludges". "that spoil the solenoid valve of the water pump due to the intervention of the "Silicate" that carries the coolant, and that on other occasions that sludge produced by the "Silicate" blocks the tubes of the vehicle's interior heating radiator.
This problem with the G13 Silicat refrigerant is documented in many forums and internet sites. You just have to search Google for "G13 Silicat".
The solution is to replace the G13 Silicate coolant with the G12 Evo, which does not have Silicate and is the coolant that Volkswagen replaced with the G13 Silicate and which it never wanted to recognize as the problem in the water pumps and heating radiators, calling it G12. Evo, instead of G14, so that users would not realize the trap.
The G12 Evo coolant DOES NOT HAVE SILICATE, there are many tutorials on the net on how to change it to G13 Silicat; Basically you have to remove the silicate bag that goes inside the coolant expansion vessel, or in some models it goes inside a support on the lower interior wall of the expansion vessel, if necessary, change the expansion vessel for one that does not have the silicate that is "the problem".
You have to wash the cooling circuit with distilled water, and then fill it with G12 Evo coolant (which no longer contains silicate), and the problems with the solenoid valves of the pumps and heating will disappear.
After changing the coolant and filling with the G12 Evo, you have to run the Obedeleven application "Bleeding the cooling circuit", and the engine will be ready.
All the best.
 |
|
|
|
Post by balooski on Aug 22, 2023 15:33:11 GMT
That's exactly what Ive done. After the parts replacement, and full clean and flush of the cooling circuit, G12Evo was added. Then this DTC P19A000 is the only one active in the engine module. I was hoping it was a case of replacing the valve, since it's a cheap and easy fix.
|
|
|
|
Post by ganimedes on Aug 22, 2023 17:18:00 GMT
Hello
Keep in mind that the Golf 7 has three coolant pumps; a low-pressure one for the car's interior heating circuit, another the classic one for cooling the engine block and another for cooling the turbo, even some engine models can have another auxiliary pump.
Greetings.
|
|
|
|
Post by balooski on May 30, 2024 16:10:51 GMT
For the sake of disseminating information, I'm updating this. In my case, the issue was solved by replacing one of the coolant valves. PN 5Q0906457. Do keep in mind, my car is a German made MK7 GTI, sold in Brazil, so your mileage may vary. Picture of the part:  |
|
