TPMS witchcraft - Replacement not working like original

[Turbo Cow]

This is actually a weird one that I can't figure out. I replaced my left rear tpms because I broke it when changing tires a few weeks ago. I bought new ford oem ones and it pairs to the car immediately without any problem.
The issue is, all the old original ones seem to report back to the car every few hours or overnight to update the dash with the latest tire psi. The new tpms doesn't do this until I drive down the street.
So basically, I could have a flat tire and not be alerted until I get down the road.
I can monitor the tire psi over night and watch the originals drop in psi (like if its cold that night) and this new one will stay at 32psi (last reading when I pulled into the garage). In the morning, the originals read like 28psi and the new one reads 32psi still until I drive down the road, then the new one updates to 28 psi like the others.
What kind of voodoo is going on with this? I checked in forscan but dont see anything that relates to refresh settings for tpms.
I used a Ford relearn tool to train the new and old tpms sensors. (small one button, grey, square hand-held tool with watch battery inside it. Came with my 2008 F250 and still works)
Please help. Its driving my OCD crazy! LoL

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[blankman]

Maybe the sensor is faulty? I have one that went out in my front right and it exhibited the same symptoms as yours is now before it crapped out. It would stick on a reading for a little than update to a new one but mine would eventually show no reading at all. Then it would work the next day or within a couple hrs until it wouldn't provide a reading at all after about a month.

 

[Turbo Cow]

Maybe the sensor is faulty? I have one that went out in my front right and it exhibited the same symptoms as yours is now before it crapped out. It would stick on a reading for a little than update to a new one but mine would eventually show no reading at all. Then it would work the next day or within a couple hrs until it wouldn't provide a reading at all after about a month.

I've tried 2 different brands of sensors now. All the new ones are in sleep mode throughout the day/night when not in motion. The originals still report back every few hours or as psi drops from say 32 to 31 to 30 when the tires cool off.
Wondering what is up with my factory sensors that they always update. Even the fordpass app shows the original 3 TPMS sensors changing values throughout the day. The new one doesn't change unless I drive.
That kinda sucks. I want to have the updates like its been doing. I want to know if I need air before I get down the road. :(

 

[rxryanm]

Oh, this is super weird. Unfortunately don't have thoughts on why.

Do you need the old set of sensors? Could you remove them from reporting range and see if that helps? I've got 3 sets of wheels & TPMS sensors for my Mustang, all kept in a 2-car garage, and haven't ever come across anything like this.

 

[G.T.]

Are the new sensors and the old sensors you replaced, the same part/engineering number?

 

[Turbo Cow]

Are the new sensors and the old sensors you replaced, the same part/engineering number?

They are not the same part number. They dont make the f2gt-1a180-ac any more. Based on my vin, the 189-ab is the replacement.

 

[jheissjr]

Swap the PCB from the old one that works into the plastic of the new one. Glue the white cap back on with CA.

 

[Turbo Cow]

Swap the PCB from the old one that works into the plastic of the new one. Glue the white cap back on with CA.

I can't because the old one is broken. I believe there is a resistor missing on the board that's causing it not to work.

 

[ORRadtech]

Is that a new part? Because that looks tampered with. Perhaps try exchanging it? Or move the missing part from the old one to the "new" one if soldering is part of your skill set.?
Or maybe consider calling all of the dealers around you and widening the circle until you find one with "new old stock" of your original part number.

 

[jheissjr]

The working PCB is missing an electronic part, got it. The same part from the new sensor could be removed and installed on the PCB with the missing part. On the other hand is the second PCB in the picture as bent as it looks?

 

[G.T.]

They are not the same part number. They dont make the f2gt-1a180-ac any more. Based on my vin, the 189-ab is the replacement.

That might account for the change in behavior?

 

[TonyT930]

This is actually a weird one that I can't figure out. I replaced my left rear tpms because I broke it when changing tires a few weeks ago. I bought new ford oem ones and it pairs to the car immediately without any problem.
The issue is, all the old original ones seem to report back to the car every few hours or overnight to update the dash with the latest tire psi. The new tpms doesn't do this until I drive down the street.
So basically, I could have a flat tire and not be alerted until I get down the road.
I can monitor the tire psi over night and watch the originals drop in psi (like if its cold that night) and this new one will stay at 32psi (last reading when I pulled into the garage). In the morning, the originals read like 28psi and the new one reads 32psi still until I drive down the road, then the new one updates to 28 psi like the others.
What kind of voodoo is going on with this? I checked in forscan but dont see anything that relates to refresh settings for tpms.
I used a Ford relearn tool to train the new and old tpms sensors. (small one button, grey, square hand-held tool with watch battery inside it. Came with my 2008 F250 and still works)
Please help. Its driving my OCD crazy! LoL

Did you resetting the tpms system using forscan?

 

[Turbo Cow]

Did you resetting the tpms system using forscan?

I tried multiple ways.
Trained using the ford tool.
Trained by letting out air from tires.
Unplugged battery for 20 min.

 

[Craig Brown]

It is recommended that you replace all the sensors at the same time. The battery inside is only good for ten years. If you have two different part numbers, you may be confusing the RFD. I would just replace the other three so that all of them are the same part numbers.

 

[Turbo Cow]

Can anyone verify that their fordpass app shows tire psi changes overnight?

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