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Finally time to Replace TPMS sensors - Suggestions for DIY coding

1.1K views 10 replies 5 participants last post by  fibber2  
#1 · (Edited)
Our 12'XLE flashed the TPMS error this morning. Tire pressure is good and I am thinking that its the TPMS failing. In that case its been a good run as we got almost 13 years (3 months shy) out of the OEM ones.

Luckily I ordered 4 sensors from AE last month which I can now swap and with Techstream coding should not be an issue. I checked around and the shops want anywhere from 125 to 250 to reprogram these plus the cost of swapping them out at $20-25/wheel.

Question:
  • Are these the ID's (ACFED098 / ACFEEC38 / ACFED2C8 / ACFEE418) that will need to be entered? Pic attached for reference
  • Can I code in the new sensors, using TS, ahead of time and then just have the tire shop swap out the old ones
  • If yes, then will programming in the new ones cause the TPMS error to stay!!
    • I am thinking yes since they don't have any pressure to measure which should be gone after the swap and a short drive
  • If Techstream is not the right programming tool, do any auto shops have TPMS loaners?

Any other advice/recommendations for the swap.

Thanks
 
#2 ·
Agree, you got good service from the originals. I've been replacing sensors on much newer vehicles the past 2 years!

Yes, those are the hex ID codes you need to enter. 42607-0C070 is the right part number.

Yes, you should be able to edit the file you see in Techstream, and you should be able to do this in advance of your service visit. When the new sensors are mounted and in service, your RKE (remote keyless entry Tx/Rx) should hear the broadcast of the 4, match it to the new ID's, verify pressure, temperature & battery, and put out the light.

There is a very small chance you might have a stuck code that will take a TPMS tool to clear out. In that rare event, you might have to ask your dealer to upload the new hex ID's via the OBD port and if the system returns any DTC's, clear them to reset the system.

Let us know how it goes!
 
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#3 · (Edited)
Thank you, will likely do this next week and update the thread

Update:
Now that the van is home, I was able to do a bit more investigation and this is what I see

Code: C2122 - Cannot receive data from transmitter ID2.
This indicates that the sensor with ID2 is failing. However when I ran a live data scan (with van stationary), I could read the temp/pressure in the interface (see pic)

ID1 & ID3 displays No Data while ID2 & ID4 display Over. Not sure what to make of these readings.



I was able to clear the code and it hasn't come back after a couple of drives. This leads me to believe that this might be a temp glitch and early sign of sensors failing. We are also having a cold snap in S Florida so that could be the reason, will continue to monitor.

For now, all sensors seem to be working and maybe they will make it to year #13 :)
 
#4 ·
I just looked at some cell phone images I took of the TPMS page in Techstream I took when I was having some issues on my 2015 back in early 2023. The temperature said "over" on almost every shot I took, with an occasional "no data" thrown in at random. So I'm guessing it not supported.

Old sensors have the most issues when cold, but once the tire warms up a bit from driving the battery voltage rises and they get the job done. Most likely what you are experiencing.
 
#6 ·
What you need is a mini VCI clone which comes with a working copy of TS.The caveat is that the S/w is married to the H/w so you can never update the TS version. If you do, it will brick the cable. Also it works in Offline mode only (with some exceptions).

Plenty of clones available on Amazon & fleabay or AE. Expect to pay around 50 to 70 for a reliable one.
 
#7 · (Edited)
Finally got to replace the front two tires along with the TPMS sensors. I did not get a chance to pre-program the new sensor ID's so fully expected the TPMS light to come on after replacement, well, It did not.

One of the tires, found the sensor housing broken. I suspect it was broken by the installer while dismounting the tire but he insisted he did not.If it was broken before, it did not trigger the error in the MFD



Interestingly, TPMS error did not trigger after installing the new sensors either. 1st thought was that since the old ones are in the van, system is possibly detecting them. Later in the day, ran a few errands and the TPMS error still did not kick in even though old sensors were home. My Maestro interface displayed the correct tire pressure on all 4 tires...weird.
Next morning, had a flat in one of the new tires but no warning or TPMS error. Pumped it to 37 psi, same thing. Finally, updated the two NEW ID's through Techstream and the system came alive with first a flashing & then a steady TPMS light. I could now see the pressure in one of the tires at 14. After inflation and drive to the tire shop, it went away.

Not sure why the system did not detect Zero pressure when the sensors were switched.

BTW the battery on the TPMS is a Panasonic BR2450A held on by a couple of spot welds. You can pry open the glued cover plate and replace it for around $5 and have a fully functional OE TPMS.
 
#11 ·
That is pretty weird that your system did not see the error of two sensors transmitting zero psi. That was killing my 2015 when I got new sensors mounted in the wheels but still had the old sensors in a baggy on the floor.