Tire pressure sensors are acting strange. The front right was reading 30 PSI and then suddenly reads 13 PSI but the tire looks fine. Left rear also reads low at 25 PSI and low tire pressure warning comes on but tire pressure with a gauge shows 30 PSI. Can these be adjusted or do they need to be replaced? Chuck

 

If they are bad replacing is the only option, there is no replacing just the battery or adjustments.