Dash lights out restarted when removing start relay in fuse box and plug in again is this the problem
Tire Pressure Monitor Systems TPMS, that amber tire and exclamation point light that comes on in your dash advises you if you have a tire with low pressure. If it's on, check the pressure in ALL of your tires to ensure they ALL have the right pressure in them, and if not, then fill them to the proper tire pressure as listed on the placard on your drivers door or door frame. The sensors in the rims transmit an rf signal to the TPMS computer and if it senses one of the tires as having too little pressure, then the light comes on. Some vehicles have to have the system relearned if a sensor has to be replaced, and some if something as simple as having the tires rotated or adjusting the pressure require relearning.
The sensors are battery powered and have an expected life of 10 years or 100,000 miles, then they will need to be replaced with new sensors. (Unfortunately the batteries are not replaceable). They can cost upwards of $150.00+ per sensor, and with installation onto the rims and retraining to your cars computer, may very well exceed $200.00/tire, depending on the initial cost per sensor of course. Also, there is no way to determine if one is bad without having a TPMS relearn tool handy. They can run upwards of $1000.00+. So basically, this isn't a job that just anyone can attempt by themselves, and will require a trained individual with the proper tools to attempt.
But I would first off suggest if you haven't checked your tire pressures, check them and adjust to the proper inflation pressures. It's fine to go a couple pounds above the manufacturers recommended pressure, just in case you have a very touchy sensor that goes off if the tire pressure goes a little as 1/2 pound low. Also, if a tire is low for an extended amount of time, the sensor may go into what's called "Sleep Mode" where it will actually turn itself off until the pressure issue is resolved. Incidentally, the light on your dash will still be on. To turn the sensor back on may require driving the vehicle at a minimum of 20 mph for at least 20 minutes.
If adjusting the tire pressure and driving the vehicle does not turn the light off, then you will most likely have to have the system serviced and new sensors installed, or at least have the sensors relearned to the computer. Also, even brand new sensors may go bad sooner than 10 years or 100,000 miles depending on how old they are when they are installed in your vehicles rims. If some older stock sensors were installed in the rims, then life expectancy may vary.
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