Sorry guys, I've looked at other threads counldn't find an answer. I'm not an electrical engineer, and hoping you guys will have a solution. I have a 2003 AE with 39K on the clock, so here goes=
I changed out the run flats to new non-run flats, and also new tpms. This was done by a tire shop with many years experience. Everything was working fine, left the tire shop , drove a couple miles, in the city and BAM! a message showed up," LR tire is flat" Do Not Exceed 55mph!, I turned around went back to the tire shop, they checked and relearned the TPMS, with their laptop. OK! started back home, traveled approx 20 miles. Pulled into my garage, and the same message showed up again. Thinking that it needed to reset on message center, went thru cleared codes, and reset. Still the same message, so I thought to my self to disconnect battery for a few minutes. Re connected battery, message was gone , everything kool. Drove about 2 miles again , message right back, so went back to the tire shop, bc i dont own the softwear, told them the problem, they redone the laptop thing.....got everything back to normal, started back home , same message, but with a twist.....LR & RF are now flat with 0 psi Do Not exceed 55 mph! Mind you none of this was happening before changing out with new tires and sensors. I hope you fellers can help or lead me in the right direction.
Thanks in advanvce for all your help in the past, now and in the future!
Max

 

I am not an expert, but it looks like your sensors are faulty. Ask your shop to replace them.
my 2 cents
TCFS

 

Computer may not be able to see that sensors are they gm sensors that may be a problem. or you just got a bad sensor.

 

Either dead batteries or not seeing sensors. If this helps, When my batteries went dead, I got XXX on the display. I could relearn them, but it came back real fast until they just wouldn't learn. I bought Schrader sensors (makes OEM) and learned them prior to having tires put on so as to prevent having a problem after the tire was mounted. Because the sensors were not installed, I got the 55mph warning, zero pressure. When I would leave them in my toolbox and the car was miles away, it would still read zero pressure not XXX.

I would see what sensors they installed. If it's some no name, I would swap them out for Schraders. There are also date codes on the sensors so you can tell you didn't get a 6 year old shelf sitter.

 

When you stated that they used a LAPTOP to program them, I thought the SAME THING. You were sold aftermarket sensors. The GM Schrader's utilize a MAGNET to set them to the PROGRAM/TRANSMIT mode. You place the magnet on the rim directly above the sensor (stem area) and that closes a magnetic reed switch inside the sensor. Once that is done and you are in the TPS Training mode, the horn will beep once indicating that sensor is programmed.

Like Ed Ramberger recommended, If they cant get them to function properly, return them and install the GM OEM Schrader sensors.

Bill

 

Thank you for all your replies..............I knew I could get some help with my problem. I will do what you guys recommended , Thanks so much for ya'll's help.

See i never had this problem before now. I had a 67 Air coupe foe the last 20 sum yrs. This is a new journey for me and technology. CF has always been here for info and solutions to problems. So thanks again, and if you ever need me to help you guys, i'll give it old Marine Corp try.
Max a.k.a. aclassicnut

 

Schrader sensor at Rockauto for 2003 for exemple.
TCFS

 

Yes - I paid $106.95 for all 4 from RockAuto and they had a date code of 2019.

 

Before you change them out get a strong magnet and try the relearn process yourself. The guy that mounted my tires "activated" the sensors with a scanner that was supposed to set them. They worked for a few miles and then quit. I reset them myself and no issues since

 

Did you have the sensors replaced because they were malfunctioning/dead batteries, or because of their age, and "as long as I'm in there"? My C5 TPMS sensors are 20 years old. I realize most people don't get that kind of luck with battery life, but I did/do, at least on these. No other batteries have, however!! Anyway, I believe whatever these new sensors are, they are not compatible. BC is right. I have several powerful, circular magnets that are usually installed in a transmission oil pan from the factory. I worked as a Tool and Diemaker at a company that built transmission test machines. I just put the magnet over the stem, and leave it until the horn chirps for that corner, then move to the next. I believe your sensors are either inferior or not compatible. '97-2000 TPMS sensors are different than '01-'04 sensors, and will not work on your car. It's also been my experience that tire shops, or any shop, really, that has a lot of experience can make mistakes, too. In Florida, a chain called Mr. Tire still can't figure out how to program my 2014 CTS TPMS sensors. Thats another story, but applicable as far as "experienced shops" are concerned......

 

Mr,.grinder, Thanks for ypur reply, I thought it woild be the thing to do, #1 I bought the AE used,so I thought it would be heading off a problem down the road. 2#- I was swapping out Run flats anyway might as well change the tire sensors.
I did order a relearn tool with the wheel sensors, and even changed out the battery in the tool. But did not use it because the tire shop used their laptop to relearn the tires . So what i'm thinking is go back to the tire shop, work a deal and replce the sensors with the ones that were taking them oyy

 

Just went through a little fiasco on my 2000. I bought it with the “service tire pressure monitor system” message. Like a fool, I tried a set of sensors from eBay like all 4 for $60 or so. Big mistake. Every time we used the tire shops high dollar hand held on them they just didn’t read right. Tire dealer said he stocked sensors for this car. Tried those. Couldn’t get them to program properly. I finally put out the cash and bought the Schraders. Problem solved. My point is that it appears a good portion of the aftermarket / generic sensors just aren’t worth ****. Spend the money and get the good ones. Finding out that first set was no good wasn’t free either. So I got to pay for install twice. Lesson learned. If you do t want to have to do it twice, spend the money the first time. Pay now...or pay later and have to do it a second time on top of it.

 

At 25-30$ each, the Schrader are not much more expensive than programmable version. @aclassicnut if they use a laptop, it is programmable aftermarket sensors (supposed to be universal), the dedicated sensors for C5 are paired with a magnet and the car system, no need of laptop.
just my 2cents to clarify.
TCFS

 

Check out this thread here regarding training the aftermarket sensors as this may be helpful, As a side note, still have these TPMS's installed and no issues over the years.

https://www.corvetteforum.com/forums...-chime-in.html

Cheers,

 

Thanks again for all input....Mr69 thank you for the read......it was very helpful. One good note is that i kept the Shrader sensors, they were operative before the tire change. What I'll do is have the tire shop re-install those and down the road when one fails i'll replace it, That beind said , as a bad shrader is removed and a new shrader installed, will the 3 others and the 1 new be compatible to the system and each other ? Or when one or two fail, do I have to replace all with new sensors?

I really have repect to all on this forum.......everyone is so heplful, the knowledge and experience 1st class!

Recpectively ,
Max

 

Usually when one battery dies, they all go out very close then you will be spending a min of $20 per tire to break the bead and install - you will pay the same labor as buying the new set now. Just get a set of new Schraders and be done with it. The day you get them, check the date codes and train them with a magnet - then you will know that they work before you show up at the tire shop.

 

I agree and Home Depot has the round magnets for a few bucks.

Internet #203613197

Model #96604

Store SKU #101931

 

when a sensor fail, only this one will fail and it does not have impact on the others. You can replace one at a time, that's no problem. Each sensor is identified independently by the FOB+TPMS ECU (electronic control unit of the car itself). Mixing new, different, old, etc... does not matter as soon as they are compatible and paired with the ECU.
as Ed is writing, when one fail, the others will soon since their battery have seen the same amount of working hours, therefore we tend to change a set of 4... but this is not mandatory. For your information also, the TPMS sensor are activated only when the wheel is spinning, therefore, more than the time, it is the mileage that have a impact on the sensor battery life.
mine started to fail around 110kmiles on my 2000.
my 5cents.
TCFS

 

Okay............very good advice , well taken! What i didnt know was the thread about Homey Depot and the 2pack magnets, I checked it locally and I'm going to invest in some.
I brag on you guys all the time,in conservation with friends, relatives, etc. The knowledge and of course experience that this forum (C2-C5)has is so informed . It can't be beat! I have seen on the internet that there techs that will charge $$$$$$ for answers to problems that should be given freely. And there be some on these forums, but haven't run accross any as of yet. What I have found is the willingness to help fellow owners with tech problems. I for one an weak in electronics, so I try to read as much i can understand. I'm more mechanically inclined than elcectronics. So a humble thank you to all. Everyone has been so heplful and advice is very well considered and taken!!
Hope this doesn't sound too corny

Max

 

You can also use an old car speaker. I use one of those magnetic nut trays. I take off the rubbery cover and there is a large circular magnet.