Ok here we go. I recently changed the rear tires on my 98. since the batteries were dead (I'm guessing they are originals I tried the TPM relaern deal with magnets but never got them to program so I assumed dead and the underdash reciever bad. but I don't get any coses for it. ) I figured i'd leave them off and send them in for a rebuild seeing as how the batteries were dead and all. Besides that the guy I bought the car from said the TPM reciever under the dash didn't work and needed to be replaced so if thats the case then the sensors, even if they had been sending a signal it wasn't being recieved.....RIGHT? Every time I start the car i have to reset the message. No biggie right ? Well that was until today. Now anytime I try to go over 70mph I get the "Traction System On" message and the car can't accelerate past 70. Is this because I left the TPM's off the car? or do I have another problem? only codes I get are the C2120HC as current. this is a TPM system Malfunction code. WTF do I do? Please tell me I have to buy 4 new TPM's and a new TPM reciever for $400.00 before I can haul butt again!!! How can you send the TPM's in for a rebuild without putting the car on blocks for a few weeks while they get new batteries? :bsso you all have 4 extra TPM's for when you change tires? WTF !!! :mad
So now i'm not sure where i'm at......dead TPM reciever like the previous owner said (even though no code in DIC) or were the batteries just dead and now I need to get tires remounted and balanced??!?!?!?!?! :mad

 

Ok new update. If i turm the traction control off It won't send me any messages and I can go as fast as I want. I reset all the DIC codes and drove fir 15 min or so and can't get any codes at all now. I'm not sure what's up now. No imput from the Forum? thats a new one to me. :skep:

 

Does your key FOB work correctly??? If it works the TPM receiver is probably working! They work off the same receiver! What codes do you have?? Clear the codes, relearn the sensors with a magnet as per the shop manual and see if that takes care of the problem.

Please try to relearn the sensors again and post the results.
BC

 

I see 2 distinct and seperate problems here.

1. Your tire pressure sensors don't work, and/or have a problem with the RF module. This (as you noted) will cause a warning at startup which doesn't affect the car's operation at all.

2. Your traction control is engaging during normal driving. This does not throw a code, and in no way is it related to the pressure sensor issues. Your car thinks the rear wheels are spinning and cuts power. This could very possibly be related to your new rear tires.
Are the tires the same size as stock? If no, what size did you put on? The traction control system is sensitive to tire heights and altering the size could very well cause this problem. Could also be a wheel speed sensor/bearing issue.

Need more info to help with this one, but for sure your traction control issue is not at all related to the TPM sensors.

:cheers:

 

Also. concerning the TPM system, these 2 quotes of yours are very contradicting and make no sense:

. This means the receiver isn't receiving signals from sensor(s).

You just said the above code is present....how do you feel this isn't applicable?

:cheers:

 

Man, you're scaring me! I just bought new wheels and correct size Kuhmos for the track. I,m not planning on running TPM's on these wheels. I always compete with my traction control off, am I going to regret this??

:eek:

 

:iagree: Even if your tires are "stock" size, if they are not from the same company they may have variation in overall rolling diameter. Since this seems to be happening and a specific speed, it does sound like your TCS could think you are slipping due to the sensors reading that your rear tires are turning at a different enough speed than the front ones. Hope that all made sense. Good Luck :thumbs:

 

Because The TPM Reciever has been dead (supposedly) since I got it and the car has ran great it never had the C2120HC code until yesterday. Only change has been removing the Sensors and putting them in the trunk for the moment. the only reason I brought this up was to see why the TPM code was issued by the DIC if the reciever was already bad (supposedly) or if perhaps it was really working but the TPM sensor's batteries were dead and the culprit the whole time.

New tires are 265/25 18 BF Goodrich KD's changed over from Pilot Sport Michilen Not sure of the size i'l need to find some paper work on them. If this is the problem "Are the tires the same size as stock? If no, what size did you put on? The traction control system is sensitive to tire heights and altering the size could very well cause this problem
what is the solution? Thanks for all your help in this issue. (EDIT) Front tires are still Sports 245/45 17 Don't know much about tires but isnt this sidewall taller than the new rears? (2nd EDIT) Just answered my own question. the 2nd number is a percentage of the tire width so this must be the problem Also looks real stoopid now that I noticed.......

Tried to relearn the TPM Sensors but never got the horn to sound. (tried this before as well to no avail making me think the batteries are dead.) Do the TPM sensor need to be a certain distance away? I should be able to program them in my hand correct?

Reset all codes last night and only the C2120 Code returned. :confused: :U :crazy:


[Modified by Wicked98, 5:53 AM 3/22/2004]


[Modified by Wicked98, 6:03 AM 3/22/2004]

 

Yep, you found the problem. The rear tires you put on the car are actually shorter in height than the fronts. This will cause traction control problems every time. About your only fix is to put correct size tires on the car, but you can continue to drive with TC off until then.
Stock, the rear tires are about 1" taller than the fronts, and this is what you want to maintain when going to a non-stock tire size. If you keep at least 1/2" taller tire on the rear, you should be fine. Sorry you had to learn this the hard way.


Yes, you should be able to program the sensors in your hand as long as you're within 10' or so of the car. This is how I did mine, I was just sitting in the seat with the 4 sensors and a magnet and it worked just fine. If you have new or known good sensors and they still won't respond, I'd say you could very well have a problem with the receiver.

:cheers:

 

Be careful how long you leave it alone this way. Your ABS might start having a fit next. :banghead: I think you can get your PCM reprogrammed to compensate for the new tire sizes. Might want to check with James at RWTD Diablosport. Hope this helps :flag

 

It's my understanding that the ABS/TC system has it's own computer. Reprogramming the PCM will have no effect on this, only on speedo reading and A4 shift points.

 

When I read the title I immeaditely thought "he changed the tire size".
Sounds like you have the answer now.
Good luck. :cheers:

 

Try pulling your BCM fuse I thin kit is #25 in the passenger footwell.
Leave it out for about 10 min. This resets the body control modle computer.
I had a prob with my 99 coupe where I couldn't train the FOB because I could never get past the tire sensor training menus. It was really weird. That took care of that problem. Try it and let us know.