Tire Pressure Monitoring System problems of the 2011 Hyundai Sonata

My car comes with a tpms system to monitor the air pressure in each tire. Intermittently the warning light indicating there is a problem with one of the tires comes on. A check with a pressure gauge of each tire always indicates a false alarm. Talking with other Sonata owners I have anecdotal evidence that I'm not the only one with this problem. When bringing the car back to the dealer they say they can't fix it because there's no issue when the car is at their garage. This can be a dangerous problem for a number of reasons - 1. The false alarm is distracting, at highway speeds this can cause the operator to think they should pull over in a dangerous environment to avoid having a bigger problem. 2. After it happens a couple of times the operator might ignore a real problem. Yet the manufacturer refuses to address the problem.

This is about the tire pressure monitoring system. When it gets about 20 degrees f or colder, the indicator states low tire pressure. Checking the tire pressure reveals all pressures are equal and normal. When the weather warms up, the indicator turns itself off.

The valve stems on a 2011 Hyundai Sonata with only 20,000 miles on it were so corroded and seized in place that in order to remove them we would have had to break the entire valve stem. Since the valve stem is attached to the tire pressure monitor we woul have had to replace the whole tire pressure monitor.

Vibration in steering, grinding noise in transaxe, low tire pressure (by dealer), refusal to perform 3,750 mile maintince secdule (dealer refused).

The contact owns a 2011 Hyundai Sonata equipped with optima h431 tires, size p225/45/r18 95v. All four tires used nitrogen gas and hot air. The contact stated that she constantly had to refill them with the nitrogen gas (at least ten times). The tire pressure monitoring system light continued to illuminate. The contact called the dealer and manufacturer who offered no assistance. The failure mileage was approximately 4,800.