Re: Tire pressure sensor fault goes on while driving
Tire pressure always changes... when you drive your vehicle for a long period of time the tires' temperature goes up along with the pressure in your tires, the molecules in the air inside your tires get excited (hot) when your vehicle is immobile for a while your tires' temperature goes down along with the pressure in your tires, the molecules in the air inside your tires get compacted (cold) This is the best time to get a true PSI reading from your tires.... the recommended tire pressure on most tires should be set at 35PSI But there might be a problem with your sensors, I work with TOYOTA their sensors are set up to where when the PSI on your tires drops below the 35PSI, the tire pressure light would then come on. You should also check if your spare tire comes equipped with pressure sensors, which in most cases they do, depending on the type of tire the PSI on spare tires will usually range from 35PSI- 80PSI you can check your owners manual for this, or simply read the recommended PSI written on the tire.
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The car management system is reading it as a fault. Could be faulty sensors giving incorrect readings. Have it scanned and see what fault codes come up. Sometimes resetting the faults fixes it, but usually if nothing mechanically wrong then the sensor wiring may be faulty (water ingress, bad soldered joint or connection etc.)
The trouble with Tire Pressure Sensors (TPS) is that they are in my opinion, too sensitive. Even a drop in tire pressure of 2 PSI seems to set them off. You may notice that the light comes on in the morning (when it's cool) but goes off after a short drive. Once your tires have warmed up (either from an outside temperature increase or by road friction) the air in the tire expands, increasing the tire pressure slightly, -usually satisfying the TPS and the light goes out.
I've used both of these methods to solve this issue: Get your tires filled with nitrogen (less expansion/contraction than air) or you could increase the tire pressure at the air filling station by few PSI.
Tire pressure sensors are just that, sensitive. If all your tire have the proper pressure and you still are seeing the sensor light and it comes back on after resetting it then the computer sensor monitor is at fault. Unless you can reset your cars' computer you will probably be stuck with going to the dealer for service. Call various other reputable service centers that have certified mechanics before turning out the big green at a FORD dealership though.
This is a common issue on all vehicles that have the TPS monitoring system. What you have is a bad sensor in one or more of the tires, or the system needs to be calibrated. If you take the car to Nissan they can correct the issue. I had the same issue with my 05 Frontier.
working with these types of tiures on a daily basis ive seen inexpereineced lads break the sensor mounted at the valve stem (inside the tire of course) if your display tells you which tire is low i would have it removed and inspect the sensor. that is if oyur pressures are set corectly, also there is sometimers a reset button and just plain driving around will someitmes clear it to normal.
Check air pressure in all tires sometimes 2 pounds of pressure difference will set it off and sometimes it takes 8 pounds. If a sensor goes out and you know which one it is pick up a new sensor at Advanced auto for 42 dollars and put it together with the one screw and go to Walmart and they will install it for 10 dollars.The sensors have batteries in them and they only last so long if it has been over five years and one goes out replace them all. The car will learn the new sensors in a few miles so just drive until the light goes out
(!) is the tire pressure indicator. Generally means one or more tires is significantly below the set tire pressure. The indicator on my 2004 Solara comes on and goes off all the time even though the tire pressure is the same on all four tires and I have reset the indicator.
Check the pressure on your tires and if they are all at the recommended pressure turn your ignition on and hold the tire pressure reset button in until the (!) blinks 3 times. That will set the pressure. The button is on the lower part of the dash to the left of the steering wheel.