I recently got 4 brand new tires and 4 brand new oem Honda tpms sensors installed. After trying to program everything and doing diagnostics, I was told the module that communicates with the sensors could be bad. The TPMS light will not turn off on the dash. Very frustrating after buying all the new stuff. Any ideas what I should be doing next? Do I have to go to a Honda dealer now? Does anybody know where the module is located? I was thinking maybe I could replace it myself and get it programmed at Honda. Any suggestions would be appreciated thank you.

 

I thought you needed something like this to re teach the the car the new TPMS. I was also under the impression that every time you change wheels and TPMS sensors it will need to be retaught.

 

I had Pep boys install my tires and sensors and they used their own tools to program everything. They tried a portable one and one that's in the shop. TPMS light is still on. Shop manager said something about the module etc

 

I'm assuming this might help.

 

Not an expert but:
1.) Are the TPMS units in each wheel designed to transmit on the proper frequency?
2.) If they have the electronic 'tool', they could start by checking each wheel to make sure each wheel sensor is active / transmitting when 'stimulated'.
3.) Have you driven it around and gone through several start / stop cycles of the car's ignition?
a.) Reason I ask is that when I get my cat back from the annual vehicle safety inspection (requirement in Pennsylvania) all of the warning lights are on the "D" is blinking, etc. I think it's due to them plugging into the OBDII port to check for error codes. It all goes back to normal after the second / third restart of the engine.
b.) Maybe drive it a day before assuming the the problem is in the TMPS module.

 

I know I usually have to drive 15 to 20 miles before they shut off, when I change my rims/tires.

 

Not talking about the (!) symbol that indicates low pressure but the "TPMS" letters on the dash that indicates a system problem, like a dead / properly programmed TPMS sensor. Just saying that when the shop messes with my OBDII port, all of the bells & whistles are lite up on my dash until I cycle the ignition.

 

That is what I'm talking about. After mine have been relearned it sometimes takes some miles before it goes away.

 

The TPMS units in each wheel are made by Honda and are the correct part. They checked each wheel. I have driven nearly 100 miles already.

 

TPMS sensors are all brand new oem Honda. Not sure about the programming, they tried twice at two different locations. I should also mention the TPMS light has always been on since I have owned the car for almost a year now.

 

I've probably gone 100 miles by now.

 

I'm more interested in how to fix this myself now. I am pretty sure the problem is the module. That is what the error code points to Anyone know where it is located? What tool is used to program the module? Is it the same tool used to program the wheel sensors? Thanks

 

When it comes to programming, that almost always means going back to the dealer. I looked on line and a "TPMS Detector" is $335 and I have no idea if that is the part that you are calling a "TPMS module".

Considering that sort of $$$, might be worth going to the dealer to have them diagnose.

 

I don't think it's ever worth going to the dealer personally. They are so ridiculously overpriced it's unreal. The TPMS module is located under the dash with the fuses. It's what communicates with the wheel sensors. I can get a used one of eBay for $40 ish and hopefully go back to pep boys and try to have it all re programmed again. Worse case scenario i I'll have to buy a tool, (which is still cheaper than a trip to the dealer) I figure I can find it on Amazon. They have a fantastic return policy 😜

 

 

I have a friend who has been a mechanic at Honda for many years. Hoping I can get in touch with her tonight to clarify everything. Hopefully I can get it all up and running again and spend as little as possible.

 

I've been in TPMS hell myself for a while.
Last year in winter I got the dreaded TPMS light and after buying the stuff to change the sensors it resolved itself when I retrieved the sensor ID's with the ATEQ Quickset.

Now about two weeks ago (a year to the day of my previous issues) I get a solid low pressure light on. I checked and pumped all the tires up to be sure and one of the rear tires was at 27psi, so that likely triggered it.
Drove it down the street and the solid low pressure light went out, great
Then I drove it a little more and the TPMS light came on, oh no

Flash forward a week and I change the two front TPMS sensors. The rear ones I think are working and the valve stems look newer. I bought the car used, so I can't be sure.
I program the computer with all the correct sensors and hope and pray!
TPMS light goes out!
Tomorrow driving to work the low pressure light comes on and this time it is blinking. Oh no

I have looked on this forum and read every thread with 'tpms' in the title.
Tried the pump to below 15psi and pump back up, twice. No luck.
Tomorrow I'm going to try the Quickset again.

Also I've done tons of research on this, but I still need a little more info.
Some say the low to high pressure won't work and you have to use a 125khz signal to activate the sensors.
Found out it has the same frequency as RFID. I might try an RFID tag reader/writer which is $10 shipped from eBay.
Found a thread about this from years ago, but no conclusion:
https://www.corvetteforum.com/forums...an-s-tpms.html
On the other hand the FCC data seems to indicate just a pressure increase should wake the sensor up, but it also talks about a "low frequency magnetic signal trigger", but it doesn't say anything about 125khz, just a lot of 315Mhz.

Speaking of 315Mhz, which is the signal the TPMS sends the car in the US. Europe uses a different one.
Yes I have been doing radio frequency analysis...lol
I found a way for software defined radio to read the 315 Mhz signal and decode TPMS (rtl_433 is the software). Today I even got the signal from a passing Ford TPMS out my window!
However I can't get a signal from my Fit
Even driving it around (above 20mph) does not produce a 315Mhz signal, but it should so I am very confused.

 

Well now I'm starting to think I should just remove that TPMS light from the dash and call it a day lol. I'm kind of determined to fix mine because I bought 4 new sensors. Such a frustrating mess.

 

No, we are going to get all this done. Won't accept failure!
It looks the the standard cheap GM style TPMS activator also does a 125khz signal, so I'm going to try that instead of the RFID one. GM also use TRW manufactured TPMS, same as Honda before they switched to the indirect method.
Already ordered this from Amazon:

Now I read you may need to use Honda software while you use this, but I'm not sure. The work continues!

 

Wow ! Sometimes for some things, it might be worth going to a shop / dealer and pay to get the pain over with.