Using the diagnostics mode I pulled three codes and desiphered them with a chart.

U2511
U1900
U19600

Are these codes correctly translated, and if so could anyone tell me what they mean? Today for the first time my car pulled the gearbox fault problem.
Although there was no appearent mechanical issue, and the check engine light didn't go on I am very concerned.

 

From the looks of things, you have a problem with your CAN bus in the car (what transfers all the information between all the different computers). This is causing the information to not make it to the tranny computer, leading to the tranny computer to have to "guess" as to which gear it needs to be in, giving you your gearbox fault indication. I would need to look at the diagrams I have, but I may be able to narrow things down a little bit since you are only having issues with your TCM, not a bunch of other systems with the car.

 

Thank you for your help. I look forward to your diagnosis!

 

harryc, from what I can tell based on the diagrams and other documents I have, your CAN bus either is getting a constant 12 VDC signal or is shorted to ground. Now, the question is which component is doing this as all of the components in the "ring" can cause this sort of indication. You are looking at a bad ECM, TCM, ABS module, or DSC module. If you do not have DSC as an option on your car, then you can eliminate that. Because you are getting the U2511 code, that is telling me that you have a communication issue between your PATS module and your ECM (ie, your PATS module is telling the ECM to start, but the ECM is not always telling the rest of the car to start). The U19600 is not a valid code. All U codes are UXXXX where X is a digit. I have tried all sorts of variations and nothing is working out. So, if you can look at that last code again, that could possibly help lead you to a better confirmation.

Based on what I have described above, I have to ask if you have had any electrical work done recently, specifically where you may have needed a new ECM installed. You can get the U2511 code if you have had a different ECM installed and they did not program the new ECM correctly. The ECM can see an error between the code it has and the code that the PATS is seeing. This "confuses" the ECM leading to some interesting situations. But, in short, it is looking like either your ECM or your TCM is starting to go. More than likely, it is the CAN bus portion of the computer that is failing, keeping part of the CAN bus tied either at battery voltage or grounding it out. Unfortunately, without the proper test equipment, it is going to be hard to diagnose this problem.

 

Thank you greatly for the information. I will have the dealership take a look.
You are right about the last code. I screwed it up. The system just read 9600, no letters.
I don't know if that helps. I can't really seem to find a fault code with no letter in front of it.

 

harry, all codes have a letter on the front. This is what helps the techs differentiate between a chassis 1000 code and an engine 1000 code. So, not sure what to tell you about that 9600 code.

 

After doing some research I discovered that a code 9600 is when the vehicle doesn't recognize the transponder in the key. A few weeks ago I read that if your key isn't flipped out completely the car won't start, so I tried it. I am assuming that it produced this code.