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Here is some info that might be useful.

DTC P0700

Diagnostic Instructions



Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor

DTC P0700: Transmission Control Module (TCM) Requested MIL Illumination.

Circuit/System Description

The transmission control module (TCM) uses the (GMLAN) to signal the engine control module (ECM) that the TCM is requesting malfunction indicator lamp (MIL) illumination. This happens when the TCM has determined that a failure affecting emissions has occurred in transmission control system. When the ECM receives the a message from the TCM, DTC P0700 will set.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The TCM is requesting MIL illumination.

Action Taken When the DTC Sets

DTC P0700 is a Type A DTC.

Conditions for Clearing the MIL/DTC

DTC P0700 is a Type A DTC.

Diagnostic Aids

DTC P0700 can not be cleared from the ECM until the related TCM codes have been cleared.

I did not find u0073 listed at all.
I agree with the idea of switching your back tires to see if the 0 air pressure moves with it and that you may have 2 seperate problems. Also agre that you should try to get as much history on the car as possible and you need to comunicate with the tcm to see why it set the p0700. Don't give up! These cars are awesome as well as all the other people on the forum who are trying to help you!

 

Read my post# 32.

Maybe I didn't explain it very well, but moving a sensor's position on the car WILL NOT CHANGE THE DIC DISLPLAY!!! That sensor will still show up in the DIC as the pressure for whatever corner of the car it was on when the relearn procedure was performed.

When the unique sensor ID#s of the 4 sensors are logged into the memory of the TPMS computer, the one that is logged in first is logged in as the Left Front tire, etc. Moving that LF wheel to any other position on the car, or even taking the tire off and sitting it in your garage within about 30 feet of the car, when the DIC says "LF 31 psi" it will talking about that sensor that was logged into the TPMS first during the sensor relearn procedure, whether it's now on the RF, or even if it's sitting on your garage floor and not even mounted on the car.

Below is a video of using a tool to do the relearn procedure to log the sensor ID#s into the memory of the TPMS computer in the car.

Bob

 

let me restate also, that the tire pressure monitor shows correct psi, both on the digital display as well as using a hand held guage!

 

Since you have the extended warranty, just take the car to the dealer and tell them to call you when it's fixed. Have he dealer escalate the problem to the Zone office

 

Doing that today!

 

As stated by other posters, don't give up. You have an awesome car.

 

alot of good trouble shooting going on here. i feel your frustration with these codes etc. i would head back to the dealer where you bought the car and get them to run you a vehicle service history to see what the car was previously in for.....couldn't hurt and may help.

 

To each of you who offered help, I want to say thank you to all, this forum and its members are the best. It is now at the dealer, letting them keep it till its fixed. I'll start a new post and let everyone know what they found and the remedy to the situation. Again, thanks so much to everyone! Hopefully one day at a corvette ride, I can meet up with some of you!

 

Sorry for that I agreed with something I obviously misread, switching the tires to see if the 0 air pressure moved with it. My mistake. See how fast it was corrected. There are many people on this forum that know these cars well and are very willing to help.

 

Used Cars are exactly that, USED. Like any other vehicle, I would have taken it to a GM Dealership in your area with a good reputation for working on Corvettes and had them do a complete and I do mean complete check of the car. This would involve a few bucks on your part, compression, oil analysis, electrical, transmission and rear end fluids, check for water damage etc; (this is what it sounds like to me).
Most Corvette owners, especially late models do have some prior experience of owning a Corvette. As most would agree, these cars are different from anything else you may have owned. It seems each one has there own charateristics that make each one for some reason, just a little different.
Also, check your spelling in your post, not doing so leaves one to think you are some kid on the Forum just making up stories. Not saying that is the case here, but does appear to be the case. Just my opinion, like a belly button, everybody has one

 

Wow, the OP came here to ask specific questions regarding issues with his car. A lecture on what to do when purhcasing a used vehicle and how to use spell check is not addressing these issues at all.

 

somewhere back in the pages I thought I read OP bought it from a dealer. therefore, to me all this checking and stuff is on the dealer's dime, especially with extended warranty. yeah, it'd be nice if it came thru originally problem free, but it didn't.

lotsa good info here from some very good people. hang in there, OP.

 

I am, its at the dealer, and I'm not really concerned with how I spell on this forum. Those people that matter have already answered to the best of their ability. Thanks again and I'll letcha (oops) know how it turns out!

 

looking forward to hearing the outcome here. I wonder if this has anything to do with the "service active handling" a lot of people had, where it ended up being a lose connector under driver side on firewall that would get seperated due to tilting/telescoping wheel?

 

Included in the papers with the owners manual was the service records that the original owner (a doctor) had. Basically tire service, oil changes, etc. But it also showed where it through a code and they installed the clip in the telescoping steering wheel.

 

there is always one in every post,

 

Ok this is my 2 cents worth, hope it helps. I have a 2007 Z06 with 14000 miles on it. I love this beast. Has you can see with the amount of miles on the car, I only take it out of the garage when the weather is nice. I drove the car to work the other day and when I got in the car to go home, I noticed the car security light came on. I turned the car off which usually resets this light. Well the car would not start. All the gages went dim and nothing on the starter. I turned the ignition off and opened and closed the door. This time the car started. When I started driving the security light came back on then the service active handling, service fuel system, traction control, service car soon. While I was driving home all the gauges went down to zero and the low fuel warning came on. I have had some of those errors before and was able to fix them by simply charging the battery. This time charging the battery did not fix the errors. I completely disconnected the battery, charged it, cleaned the terminals, and tightened them down good. Started the car and still had all the errors. I scanned it and got the U0073 error code that read bus disconnect. I remember reading on this forum that just one bad wire on a controller can cause all kinds of problems. So after exhausting all the usual, make sure all grounds are good and the battery is good and the terminals are tight, I disconnected the battery, pulled back the passenger carpet to expose the control modules and carefully disconnected the cable connectors to each of the three main controllers. I am not a fan of the metal used in these connectors and I wanted to make sure there was a good connection between all the pins by reseating the connectors. Well so far so good. Reconnected the battery started the car and no errors what so ever. Took the car for a good hard 100 mile spin and still looking good. I am back to enjoying this beautiful beast.

 

Did the dealer have the OP eliminated?

What happened?

 

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