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Why are my tpms measuring this way?

Jimmy N.

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#21
A dealer can't, and won't, touch it. It's a mandated pest.
 

Diboblo

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#22
They are suppose to relearn every time you drive the car, otherwise when you rotated the tires or put new ones on they'd continually be jacked !
I believe the dealers have a tool that forces the BCM to refresh the link to each wheel with the L/R F/R display.
You can reinitialize the ABS module, with AlfaOBD. This will force a system relearn, of all the sensors.

Alfa also allows you to modify the pressure thresholds, so the alarm is either pushed above, or below OEM set point... to avoid Hal9000 nagging you.

Bob
 

Diboblo

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#23
Researching turning TPMS off, with AlfaOBD... this is what I learned:

It can be done. No warning beeps, or lights, or messages.


Here is the routine:

VehConfig 3 Base TPM system present: NO

VehConfig 3 premium tpm system present: NO

VehConfig 5 non regulated tire pressure information system: NO

VehConfig 7 TPMS configuration: Logic 1 NHTSA Enable Warning

Reset the rf hub

Just in case you want to disable, for one reason, or another.

Hope this helps.





Bob
 

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Bowtie Guy

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#25
I m pretty sure the warning isn t activated until the tire goes below 22lbs ( unless its faulty )

I fill my back tires to 35 for a short ride to get rid of the warning,,,,
Then drop them back to 24 ish in the shade
The warning stays off until I get below 22 lbs which usually happens on the cool garage floor
My fronts are always 36-40 so no issues
 

DGatzby

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#26
I put more air in mine and it seems to be fine now. Even with 28-30 initial pressure as usual, now it is back to normal.
 

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#27
My Tazer turns this off no problem. Very useful for track days.
That's good to know! Thx!
I m pretty sure the warning isn t activated until the tire goes below 22lbs ( unless its faulty )

I fill my back tires to 35 for a short ride to get rid of the warning,,,,
Then drop them back to 24 ish in the shade
The warning stays off until I get below 22 lbs which usually happens on the cool garage floor
My fronts are always 36-40 so no issues
Then all of my sensors are faulty. Mine will alarm the second it sees 27 PSI or less on a cold garage floor. Then go for a short ride and they'll go up to 30 PSI when the tires warm -which is in normal range, but alarm won't reset unless I fill them up past 32 PSI (34) and drive it. It seems like the factory settings for this are set for an alarm range that's too narrow.

-Isn't 36-40 PSI on the front tires a bit too high? If you overinflate too much the tires will wear in the center??.....
 

Bowtie Guy

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That's good to know! Thx!

Then all of my sensors are faulty. Mine will alarm the second it sees 27 PSI or less on a cold garage floor. Then go for a short ride and they'll go up to 30 PSI when the tires warm -which is in normal range, but alarm won't reset unless I fill them up past 32 PSI (34) and drive it. It seems like the factory settings for this are set for an alarm range that's too narrow.

-Isn't 36-40 PSI on the front tires a bit too high? If you overinflate too much the tires will wear in the center??.....
27 seems pretty high
I believe the factory setting is 25% lower then the required inflated pressure
So I guess that s pretty close but still seems like a small range to work with

Yes if I drove the car regularly they may wear in the center a bit
Sitting in the garage they hang around 36
Out tooling around they go to 40 pretty quick but for the amount I drive I prefer them a bit higher up front
That fat car will flatten them out at 40 no problem LOL

The TPMS are very sensitive
I ve read metal caps can cause issues over time. Not to sure if anyone has experienced this ?

Stay away from the tire sealer also
 
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#29
All ours trip an alarm when the pressure is below 27 PSI.
Also you cannot trust the autolearn system to show the tires in the correct positions. Newer vehicles I'm told have a receiver in each wheel well and should work better but ours just have 1 receiver in the RR wheel well and seldom show the correct tire positions.
 

2fast4u

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#30
I have turned mine down as far as I can, now it will hold at 26 psi, going lower will trigger the nanny...during the summer when racing I turn the monitor to just a TIPS instead. All done with Alfa OBD.
 

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#31
I would say bad sensors. I'm assuming this is a multiple swap, long time thing and not something that just suddenly happened on the last start up.

Mine have been right on (within 1 lbs of my electronic and old mechanical made in the USA gauge) through multiple sets of tires. I actually drive with the air pressure displayed (call me OCD - fun to watch it change based on conditions - if I could auto log it, I would - data is data and can always tell you something). Sometimes after swaps they've taken more or less time to resync with the car, but never more than a day.

I don't think they're that expensive; considered swapping them? Like $35 bucks or so, I think.

PS - if you move the "bad" TMPS from one position to another does the bad reading follow?
 
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Thread Starter #32
I have not tried swapping them around. Soon however my summer wheels and tires will be coming off and my original slingshots and AS Pirellis will be going on for the winter slumber.
 

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