How to reset the TPMS in the car, NOT the wheels

[LarsenGrind]

I’ve had a problem with the TPMS in my car for a long time.
It’s a ‘17 GT and I’ve had it since brand new. My TPMS sensors started failing last year due to the batteries dying.
So I had all 8 changed last year when I put my winter tires on.
The car sees the correct pressure on all 4 tires on the car. I usually put 2,2 bar (32 psi equivalent I think) in, and it goes up and down due to the weather and driving. So they work just fine.
But the low pressure icon in always ON, on my cluster.
How do I reset the car to accept 2,2 bar as correct pressure?

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[Skye]

There is a placard in the door jamb. What does that placard say the pressure should be?

 

[Tank.]

Some vehicles have a sensor in the spare, not sure if mustangs do but worth searching.

 

[LarsenGrind]

Some vehicles have a sensor in the spare, not sure if mustangs do but worth searching.

I dont have a spare tire. Never had one.

 

[Skye]

https://www.mustang6g.com/forums/threads/tpms-change-parameters.205565/#post-4118501

Above is a thread with some TPMS research I've recently done.

In the US, the car's programmed TPMS reference cannot be readily changed by the Owner/Operator. There is software like FORScan where you could change the reference.

In the US, each model has a programmed set point, with that reference listed in the door jamb. If the pressure falls 25% or more in 20 minutes, the alarm lights. IDK what the EU standard is, how far down it has to be.

In the most recent version of Ford's TPMS sensors, they auto-sense. But in the pre-2018 models, they might not. The units might have to be programmed using a programming tool.

https://www.cjponyparts.com/resourc...SLrS6keZZXy7C45VzbnKwZIiF7DkhrN4PVp1jEOEYOGF9

This is one example how to manually program the wheels.

Cars with non-Ford sensors do have problems. Not every one all the time, but we've had a few discussions of Drivers having issues. If these are non-Ford units, it's something to consider, after you've exhausted all your other efforts.

You've confirmed you do not have a spare.

You mention car seems to recognize the wheel's new sensors and pressures, but the low level light will not go out. There's a second set of wheels. I can think of three possibilities:

- There are other wheels and sensors close-by. The car is confused. The car could be recognizing those other sensors. Ford recommends keeping other sensors of the same frequency at least one meter away when attempting to train them to the car

- The current set of wheels are lower than the set point which is programmed into the car. Check the placard in the door jamb

- While the car is recognizing sensors, it's still doesn't understand completely. Check the Owner's Manual. There is a TPMS reset procedure. This process is to train the wheels position to the correct place on the car (you moved the wheels. Now, the car needs to recognize which wheel is on which corner.)

I hope any of this will help. If not, it will eliminate several variables that could be influencing the issue.

 

[LarsenGrind]

Ive had problems with the OE sensors that came with the car. And same problems with my summer aftermarked wheels. Dont know what sensors they put in.
And I dont know what brand is on my two sets now (that was put in last year).
The door placard says 32 PSI, and thats dead on 2,2 bar.
There are no cars in the near vicinity of where I park my car, and my winters are stored 6 miles away.
And the problem don’t go away even when I drive in the countryside where there are no others cars for miles and miles.

 

[SheepDog]

Does the information page with the tire pressures show them all at 32 PSI?

Have you tried disconnecting the car battery for a while?

 

[LarsenGrind]

Yes they all show 32, and that goes up 1 or 2 when driving.

 

[SheepDog]

Yes they all show 32, and that goes up 1 or 2 when driving.

disconnect the car battery for a while, then hook it back up and see if the light goes out. If all the wheel positions show 32 psi, then the sensors are reporting to the module

 

[LarsenGrind]

I’ve had the battery disconnected several times when working on the car.
So that’s not a fix either

 

[SheepDog]

I’ve had the battery disconnected several times when working on the car.
So that’s not a fix either

You may have to take it to a tire shop and have them train the sensors to your car if the ones in your wheels are not OEM. Places here in the states will do this for free, not sure about Denmark

https://www.cjponyparts.com/resourc...Op02pPQjvwfRWVjr5z5Wb7M40B8lUR8BoCMyIQAvD_BwE

I do believe that there are different TPMS standards in Europe, so if the TPMS sensors in you wheels are US spec, they won't work

 

[LarsenGrind]

I had the set on the car relearned with a more ‘pro tool’ just last month athe tire shop.
That tool could see all the info each sensor contains.
I think my problem is the value set in the car computer, not the sensors as they go up and down as they should do.
Last month I drove down to do some laps on the Nürburgring. Not sure how high the pressure went during laps, but I put 2,2 (32psi) just before.
Might have to go and put 0,1 bar more pressure in each tire and see if I hit the cars set point, or if I explode a tire.

 

[skinnyb]

You can check the set point with Forscan. I remember modifying it on my F150 when I ran load range E tires. I have 30 psi cold in mine and the light doesn't go off. I think the low set point is like 28 or something...

 

[sukhoi_584th]

Try temporarily inflating to whatever the sidewall max is for the tires and see if the light goes away after a bit of driving. That'll tell you if it's simply a set point problem, or an issue communicating with sensors (seems unlikely given you get PSI readings). Third option, probably the most likely, is there are more than 4 sensors paired to the vehicle and you're getting the light because it's only receiving data for 4 sensors.

 

[Skye]

For a reference, I attempted to identify a Ford EU sensor part number and source, but was not successful.

Ford Parts UK lists a few kits, but Mustang is not a model posted in the fitment guide.

There's a 2015 reference here, pointing to a EU site selling Ford kits, but that German page is deactivated.

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