Checking Aftermarket TPMS Batteries: What Your Sensor Is Really Telling You
Alex and Emma break down how to properly diagnose aftermarket TPMS sensor issues without jumping to conclusions about dead batteries. Learn why a dedicated scan tool matters and why tire pressure checks always come first.
In this episode
Always check cold tire pressure against the vehicle placard before diagnosing sensors
Phone apps and generic OBD scanners cannot directly read wheel sensors
A non-responsive sensor may indicate setup or protocol mismatch rather than a dead battery
Most aftermarket TPMS sensors are sealed units requiring full replacement when batteries fail
Cracking open a…
The skinny
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