thefordman9879

Started to happen recently that driving around town I have no TPMS sensor issues then when i get on a highway or interstate and get above 60mph the TPMS system will show thats theres an issue. Then after I drive for awhile around town the issue clears and no more TPMS light. Is there an issue with the sensor on one of the wheels or the system itself and whats the easiest way to diagnose at home? Also is there a tool for the phone with the Bluetooth obd II scanner that i can use to monitor the TPMS system for each wheel?

gDMJoe

Possible causes for the issue
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• radio frequency interference
  • cell phone chargers
  • GPS power supplies
  • other aftermarket electronic devices

• faulty, failing sensor battery *estimated life is 10 years or 150,000 miles

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thefordman9879

but why would any of that change and cause an issue after 60mph?

Spiky

RLXXI

If the sensors are OEM I'd bet $$$ the batteries are going dead, IIRC they only have a life span of about 7 years, going by your signature they are 8 years old.
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thefordman9879

Alright, thanks everyone ill check those things. I can use forscan to check what the pressure is on each tire individually?

Spiky

Yes, I've done it. Although I forget if it gives an actual psi number, I think so.

RLXXI

Yes it's in the pids although they show 6 tires due to some trucks having dual rear wheels so you will see R/F, L/F, R/R inner, R/R outer, L/R inner, L/R outer. Select them all as I don't remember which ones are for the single rear wheel axle. You will know as one of each rear will show 0 psi.
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thefordman9879

Had two newer tires installed on the front and had the shop check the sensors. He said that all of them looked fine(since they reported back rather quickly still to his tool) and could be PSI related since truck door jam sticker says 40 and they were at almost 50. He lowered all the tires to about 40 and said if the error comes back to try come in with the error still up. I will also try to catch it with forscan.

Spiky