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Re: Tire Pressure sensor keeps going off on Ford F-250
These sensors are a troublesome and seem to be sensitive to slight air
pressure changes try have your tires filled with nitrogen instead of
air the pressure will not fluctuate with temp change and does not have
to be checked as often.
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That is the low tire pressure warning. It can come on for several reasons. It commonly comes on in the fall as temperatures drop, the air in the tires contracts and the pressure drops. Check the air pressure and fill as needed. The tires also all need to be within 4 psi of each other.
Another common cause is that one or more tire sensor needs the battery replaced. This is not generally considered a DYI project because for most cars the tires must be removed from the rims. Finally the sensor can be damaged by hitting a curb or by adding chemicals into the tire used to seal small leaks.
As long as you check your tires visually prior to driving it is usually ok to wait to service the sensor for when you replace or rotate your tires.
Please keep in mind driving on a tire with low pressure can damage the tire, the rim or even cause delamination of the tread and cause an accident. The Firestone recall that involved Ford Explorers several years ago was from driving on tires with low pressure.
If you mean the TPMS tire pressure monitoring system dashboard light, make sure the tire pressure is set according to the decal on the drives door. If that's ok, have a tire store calibrate your tire sensors. If that doesn't help the sensors themselves need to be replaced. The battery in the sensors have a limited lifespan which is the down side to the system. I had to have mine reset after a tire went flat. If it only leaks a little (normal leakage) it seems to clear if you air it up to spec before it gets too low.
My wish is that the dash told which tire was low and would go red if it got below half it's recommended tire pressure. I freak if it comes on at all since I don't know if it's just a pound low or totally flat! Car manufacturers need to improve this system greatly!
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.
I assume this is a Ford vehicle. Start by having the rear axel serviced At the dealership. There is probably metal dust on the magnetic speed sensor, that triggers off of the ring gear inside the axel housing, causing the fault warning lights on the dash. Run an OBDII scan with a print out while at the dealer. Of coarse fix the tire.
well it depends, if you have just reset the tire pressures, the light should go off by itself, if it doesn't then you have a bad tire pressure sensor. If you have replaced the sensor, it must be programmed into the WCM by the dealership.
Fixing the tire and setting all the tire at the proper pressure should turn the light off automatically. You might have to go to a Dodge Dealership.
The only reason that I can think of is the pressure sensor was damage when the tire repair was performed. To patch a tire, they need to take the tire off the rim. The pressure sensor can be easily damaged during this process if they are not carefully.
Just keep that possibility in mind.