TPMS Monitors

What vehicle is this on? Other than a few posts I see a lot of mis guided information on here. If the light is staying on and all tire pressures are remaining the same and assuming you have no leak then one of things need to happen.

1. The system needs to be relearned per the manufacturers process wether it be by using a tpms tool or by a specific drive cycle.

2. A sensor has a low or faulty battery causing the light to illuminate.

Best bet is to take it to someone who has the tool and can read each individual sensor, they can tell if the battery is good or not and which ones are responding to the tool.

If the tool reads all the sensors and all the battery levels are good then it is a issue with the tpms monitor computer