Engine coolant bypass valve control circuit open!!!!

[RedStallionA3]

P2681 how do I fix this code ??? Is it the thermostat / waterpump or is it something simpler then that?? I've been without my car for days and I'm getting over it

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[evo v]

I need to check my old scans to see if the error is the same but on my A3 8V I had to replace one of the auxiliary water pumps. It was on the back of the engine underneath the turbo. It is wrapped in a blanket. It doesn't affect how the engine runs. When is bad you will feel change in interior heating output with change of the engine rpm's.

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[RedStallionA3]

I need to check my old scans to see if the error is the same but on my A3 8V I had to replace one of the auxiliary water pumps. It was on the back of the engine underneath the turbo. It is wrapped in a blanket. It doesn't affect how the engine runs. When is bad you will feel change in interior heating output with change of the engine rpm's.

Sent from my XQ-BC62 using TapatalkWait wait whaaaaat so my issue might not even be a thermostat/waterpump issue ? I need to know cuz I already bought a thermostat/waterpump housing (can be returned) but i know in that area ur talking about I may have issues that I couldn't figure out what it was but I do know that inside my car it gets really hot more then normal

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[evo v]

Soo... I found some old logs. I had 2 errors P15446 and P2681. The first one I fixed by replacing the pump on the back of the engine. The second - by replacing the valve on the driver side of the engine. It is tucked under the air intake pipe going to the turbo, above the flywheel. What I read back then was the coolant was leaking through the connector onto the pins causing them to rust. I replaced both the connector and the valve.

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[MikTip]

When you changed the radiator...was all the air removed while filling the new radiator and system?

Cause your whole issue there might just be air in the system.

[RedStallionA3]

When you changed the radiator...was all the air removed while filling the new radiator and system?

Cause your whole issue there might just be air in the system.I did not and was told that

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[RedStallionA3]

So rent one of those radiator kits ?

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[MikTip]

So rent one of those radiator kits ?

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Google is your friend!

Google how to bleed the air out of Audi A3 radiator when filling coolant.

[RedStallionA3]

OK after getting all the air pockets out and changing my battery to a agm battery the coolant fault codes are gone wen scanning car but turbocharger boost control position sensor circuit range/performance fault code p2563 is coming up? Anyone have any idea what this may be ?

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[MikTip]

OK after getting all the air pockets out and changing my battery to a agm battery the coolant fault codes are gone wen scanning car but turbocharger boost control position sensor circuit range/performance fault code p2563 is coming up? Anyone have any idea what this may be ?

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Yes I have a clue...

Locate and verify the connections on the boost sensors. Otherwise known as MAP(Mass Air Pressure) sensors. 2 of them One on the intake...one on the boost line going into the throttle body down low near the ground.

https://www.eurotuned.com/img/cms/64.10.15_neuspeed-power-module-2.jpg

You probably did something to one when the radiator was changed...

https://dz310nzuyimx0.cloudfront.net/strapr1/b56847744f1a95705faf4c527492f451/462a3ec7fa9c1780798a154c2b3b6694.png

#21 Right next to the radiator!

[RedStallionA3]

Leak going into the engine from coolant hose. Doesn't leak until coolant boils 284895

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[MikTip]

Leak going into the engine from coolant hose. Doesn't leak until coolant boils 284895

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Very common issue...

Vent Tube Adapter - Audi 06K-121-143

Easy fix to simply replace

https://s3.amazonaws.com/rp-part-images/assets/ebcb888f2e6400a3d2748cf35c2b8398.png

[MikTip]

https://cdn.shopify.com/s/files/1/0316/3901/products/SB2A4122_large.jpg?v=1624471619

https://www.emdauto.com/products/emd-auto-billet-coolant-adapter-for-mqb-2-0t-e888-3?variant=40092390850743