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I have tranny code po748 on my vw

I have bought a tranny harness and solenoids that are new only a week old and got code on second day

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2 Answers

Well can not resolve trans issues here

I owned a trans shop-- once

Why the new harness?
Why the solenoids?

Who is or has worked on it?

The code & possibly some of the problem
you can google

No way I will tell or suggest to you-- to replace or do
anything

Have a dealer work on that when is comes to VW/Audi

Takes different scan tool software, we don't have or use
in most cases here in north america

Keep in mind that it is mechanical issues & moving parts
that send the signals out to those sensors & then is get
complicated as you get into the electronics

Now you will tell me I am rude & your a professional
No way for me to know who comes here

Posted on Nov 26, 2014

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P0748 Volkswagen - Pressure Control Solenoid 'A' Electrical
Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty line pressure solenoid valve 'A'
- Line pressure solenoid valve 'A' harness is open or shorted
- Line pressure solenoid valve 'A' circuit poor electrical connection
What does this mean?
When is the code detected?
Engine Control Module (ECM) detects an open or shorted condition on the solenoid circuit
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission shift shock
P0748 Volkswagen Description
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM).

Maybe try and reconnect all the connections.

Good luck!

Posted on Nov 26, 2014

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Posted on Jan 02, 2017

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When Monitored and Set Condition:

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