Well we got seemingly two different answers to the same question:
1. If your tires fall 25% below established baseline, then your TPMS light will illuminate.
( the above is a bit unclear since “tires” is plural so probably Discount Tire may have meant “If a tire falls 25% below established baseline, then your TPMS light will illuminate” where perhaps (but I don’t know) established baseline means Ford’s recommended tire pressure located on the drivers side inside door panel which mine says “AT 230 KPa/ 33 PSI COLD” )
And…
2. Don't believe the system looks for a specific tire pressure, it looks for a difference between tires. For example, if one tire is 6 psi lower than the rest you'll get a check tire pressure warning.
1. If your tires fall 25% below established baseline, then your TPMS light will illuminate.
( the above is a bit unclear since “tires” is plural so probably Discount Tire may have meant “If a tire falls 25% below established baseline, then your TPMS light will illuminate” where perhaps (but I don’t know) established baseline means Ford’s recommended tire pressure located on the drivers side inside door panel which mine says “AT 230 KPa/ 33 PSI COLD” )
And…
2. Don't believe the system looks for a specific tire pressure, it looks for a difference between tires. For example, if one tire is 6 psi lower than the rest you'll get a check tire pressure warning.
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