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Code P0753

Tiny
JDMARTIN15
  • MEMBER
  • 2008 AUDI A4
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 152,000 MILES
Hello everyone, I have a P0753 "Shift Solenoid-A electrical" code on the car listed above S line turbo CVT. I've tried changing the transmission oil, transmission filter, and removing and getting the TCM checked and no dice. Symptoms include no shifting, the PRNDS lights flashing. Any other advice greatly appreciated.
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Monday, May 30th, 2022 AT 4:06 PM

11 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Hi,

The code indicates there is either a short to battery voltage or a short to ground. Take a look at pic 1 below.

According to the code and description, the TCM needs to be replaced. The wiring is integral with the TCM and is replaced as a unit with the TCM.

Are you certain this has a CVT?

Let me know if this helps or if you have other questions.

Take care,

Joe
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Monday, May 30th, 2022 AT 8:48 PM
Tiny
JDMARTIN15
  • MEMBER
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Hello Joe, thank you for your reply. Yes, this is a CVT transmission. I have pulled out the TCM (It was not fun) and I took the TCM to a modules shop and they inspected it and said there were no faults found according to them.
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Monday, May 30th, 2022 AT 8:55 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Hi,

Something is causing the short. The TCM is responsible for both power supply and the ground paths. I suspect it is possible that when checked, they were beyond the problem.

Have you inspected the wiring/connections for damage?

Let me know.

Joe
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Monday, May 30th, 2022 AT 9:34 PM
Tiny
JDMARTIN15
  • MEMBER
  • 42 POSTS
The only connection I checked was the connector to the TCM and didn't see any abnormalities in the connector. It looked intact. I don't know what other wires I need to check. Any advice?
I'm not very well rounded in electrical issues, but it looks like the problem is narrowing down to it, which is helpful because from what I looked up on the web the ECM, PCM and the solenoids themselves can potentially be at fault as well. This is helpful. Thank you.

- Jesus
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Monday, May 30th, 2022 AT 9:47 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Hi,

According to my manual, if there is a short to power or ground, it's the TCM. I totally understand why you would be concerned. I'm sure it isn't cheap. But that's what I have.

I have two Audi vehicles (A4 convertible and A8). There is nothing nicer to drive when they are right. When the break (and all cars do), I lose a little more hair and a lot more money. LOL

Is that the only code that is present?

Let me know.

Joe
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Tuesday, May 31st, 2022 AT 7:42 PM
Tiny
JDMARTIN15
  • MEMBER
  • 42 POSTS
Thank you.
It's not too expensive to have the TCM rebuilt. It's more expensive to replace the TCM with a new one because it'll have to be programmed by the dealer or a shop with dealer capabilities. But like I said, I pulled the TCM out and took it to a shop that specializes in rebuilding modules, and they tested it and told me there's nothing wrong with the module, unless they made a mistake, so now I'm at a crossroads. Audi's, they are a joy to drive when they're right, but when they're not, it's an absolute nightmare. Expensive as well. The CVTs are horrendous and continuously (no pun intended LOL) fail. I'm only getting the P0753 code. Luckily for me.
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Tuesday, May 31st, 2022 AT 10:27 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Hi,

If you send your PCM out for repair, make sure they are aware of the code you have. Also, there are online places that sell remanufactured ones for good prices. I know because I was in the same situation. LOL And it was plug and play.

It's funny you are the first one I'm replying to tonight. I just had to replace the oil pressure switch on the A4. All I can tell you is this. It should be a 20-minute job. It took 30 minutes to locate it (impossible to see), another 45 minutes to get the connector off without breaking it, and about 2 minutes to replace the sensor. LOL The manual shows it right behind the oil cooler. Well, that's correct, but it is recessed back into the engine block where you can't see it. Ugh!

And yes, the CVTs on any vehicle are known for having problems. The purpose? To meet the constantly increasing federal emission requirements. The CVT helps prevent the engine from revving too high.

Anyway, if you have a chance, let me know how things turn out for you.

Take care,

Joe
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Wednesday, June 1st, 2022 AT 7:52 PM
Tiny
JDMARTIN15
  • MEMBER
  • 42 POSTS
Good day, wow really the PCM was plug and play. That sounds encouraging. For the TCM, you got to run the transmission adaptation from what I researched. I had to do that after changing the transmission oil as well (that was a messy nightmare BTW lol)

Oh no, that sounds like a pain. It's like European engineers just rolled the dice and threw cars together making the parts expensive and hope to make their car owners miserable lol. I got this annoying buzz sound coming from the glove box that I got rid of and came back. Turns out it was a switch for the climate control that's easy to replace but this car has all the problems lol.

I'll post a pic of the DTC code. Just for reference. I'll update when I have any luck, lol. Thank you.
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Friday, June 3rd, 2022 AT 3:20 PM
Tiny
JACOBANDNICKOLAS
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Hi,

They are great when running, but when they fail, Ugh! LOL

You take care and I look forward to hearing from you.

Take care,

Joe
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Friday, June 3rd, 2022 AT 8:26 PM
Tiny
JDMARTIN15
  • MEMBER
  • 42 POSTS
Hello, it's been a while. I have an update on the car. So, I replaced the N88 solenoid (solenoid A) on the valve body and again drained and filled the transmission oil as a result. The car originally wouldn't go into gear at all without stalling and now goes into gear with no jerking. Limp mode or the PRNDS light was still on for some reason. I don't know if I had to do a specific procedure after changing the solenoid, but fast forward a couple weeks later of turning the car on and running it, limp mode turned off, I reset the service light and erased the stored code and so far, so good. Hopefully it continues that way. Transmission shops would've quoted me a rebuild for a $50.00 part. Just some elbow grease and enduring the Southern California heat and saved hundreds of dollars. Thank you for the help and advice. I appreciate it.

Jesus
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Thursday, August 11th, 2022 AT 11:30 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

Thank you for the update. I'm glad to know it's fixed. If anything changes, let me know.

Also, please feel free to come back anytime in the future if you have questions. You are always welcome here.

Take care,

Joe
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Thursday, August 11th, 2022 AT 1:50 PM

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