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So multiple times a day my tire pressure system will show PSI on all 4 tires then i will get an error code "Service Tire Pressure System" 99 out of a 100 it will be just as it shows in the pic. Or either of the passenger side front or back tires, very rarely does the driver side not show PSI. The Tires are not the original so i believe this is the 2nd set. I bought the truck used about a month and a half ago. By the way this is one of the nicest riding trucks even cars i have ever been in, has 4 corner air ride. Here is what i think is happening, When the original owner changed tires he did not replace the battery powered sensors in the rims so the batteries are getting low and throwing a code. So the problem with that is that BOTH front and back sensors will go out at the same time, which tells me it is NOT the battery, is there a sensor other then the TPS in the rims that could be loose or going bad ?
 

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