I’m having difficulties (it ain’t working) changing the TPMS settings on my 2012 with MM3.

The 35’s don’t need 70 PSI all the time.

Good batteries, key set to on, set the new values, dash lights turn on and a few dings on the dashboard so I know it’s talking to the truck’s computer.

However the dash continues to show the low pressure warning every time the truck starts up.

When I go back to MM3 to re-tune it the values I’ve entered are still there so I’m at a loss.

Any guidance here?

Do you think it could have something with the light load button on my year of truck that the newer trucks don’t have?

The MM3 has parameters for max load and light load that are both correctly entered... thanks guys!


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