TPMS light.

[rallytaff]

Checked all 4 tyres. 39 front, 36 rear. Light on dash didn't go out after trip. Any ideas?

 

[Capri to ST]

Maybe one of the sensors is bad?

 

[rallytaff]

Unfortunately, our cars don't tell you which one. I'll go to the dealer tomorrow and get one of the mechanics to look at it. If the tyres are still keeping the correct pressure, I can ignore it for now.

 

[SteveS]

If you have one of the cheap TPMS sensor training devices (roughly $10 on Amazon) you can use it to determine which wheel has a bad sensor. Then you can buy a replacement sensor (set of 4 for $25 or genuine Motorcraft 1 for $36) and just have a tire shop swap it. They should charge you the same as a flat repair. All they have to do is break the bead, unscrew the sensor from the back of the valve stem and screw the new one on, then reinflate the tire.

 

[Intuit]

The sensors have batteries so have a finite life span. Might make sense to just go ahead and do all of them.
Had a TPMS diagnostic tool that displayed temperature and battery level, in addition to temperature.

Do NOT purchase anything manufactured by Autel. They sold a butt ton of defective devices and won't support them.