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Anyone got the P2755 Transmission Fluid Controller Circuit High

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Old 10-18-2017, 09:44 AM
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Default Anyone got the P2755 Transmission Fluid Controller Circuit High

Recently I got a P2755 on my 2012 Audi Q7 3.0 tdi. It's a CRCA engine.

Has anyone got this code, and a solution?
Old 11-15-2017, 11:12 AM
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Got the solution if anyone else gets into this problem:

The multifunction switch on the gearbox, under the car had water inside. This caused rust in the connector pins and faulty signals.
Error message in display "Malfunction in Gearbox", Adaptive Cruise controll stopped working, Start/Stop and Error in Canbus, "Single wire mode".

In other Words, lots of funny faults!

Despite all this errors, the gearbox was fully functional - no jerky shifts or anyting!

New switches installed and all ok!
Old 03-02-2018, 02:15 PM
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Default Q7 gearbox malfunction

Hi

I am getting the same message on a 2013 Audi Q7, reset the code and then was all good for a few days then same message. We checked the connectors like you say and some pins had slight corrosion so cleaned up with some connector treatment but code came back. Which switches did you change? Was it both sides, gearbox and the switch from the car.

Many thanks in advance
Old 03-05-2018, 12:00 AM
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Hi,

Interesting!
Unfortunately the Message came back after a little while. It seemed so obvious that the Connectors caused the fault.
We are still working on the issue. We will try to disconnect the trailer unit today to see if the faults still are there.

Do you also have the Canbus error, and the error code for the ACC heater (Z47)?
Old 03-05-2018, 12:31 PM
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So we did some more digging and it was saying gearbox cooler solenoid, so we found it and the plug was burned guessing by the faulty solenoid. Have ordered the plug and the solenoid will fit and let you know tomorrow. There were no other fault codes in the system only code was 12753 valve for transmission fluid cooler, that is the code with the dealer computer.
Old 03-12-2018, 12:36 AM
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Originally Posted by Tim1087
So we did some more digging and it was saying gearbox cooler solenoid, so we found it and the plug was burned guessing by the faulty solenoid. Have ordered the plug and the solenoid will fit and let you know tomorrow. There were no other fault codes in the system only code was 12753 valve for transmission fluid cooler, that is the code with the dealer computer.
Ok! Good to hear a possible progress!

Is this Solenoid inside the gearbox? Do you have some photos?
Old 03-12-2018, 03:11 AM
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It was the gearbox cooler solenoid with the plug that was burned, changed both parts and so far so good done 600 miles and no problems
Old 03-12-2018, 03:50 AM
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Originally Posted by Tim1087
It was the gearbox cooler solenoid with the plug that was burned, changed both parts and so far so good done 600 miles and no problems
That's great!
Can you please post the part numbers?
And the location of the parts?

Much work to change these?

Thanks in advance!
Old 03-15-2018, 02:42 AM
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Originally Posted by Tim1087
It was the gearbox cooler solenoid with the plug that was burned, changed both parts and so far so good done 600 miles and no problems
Hi, Can you confirm part number 4H0121671D for the solenoid ?
Old 04-13-2019, 07:38 AM
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Default Solenoid location

Originally Posted by Shalme
Hi, Can you confirm part number 4H0121671D for the solenoid ?
hi where was the solenoid valve located ? Have have the same odd errors

cheers


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