If they are the originals, the battery is probably dead in the sensors. When I went to LT tires, I had to have mine reprogrammed. So I guess high pressure will trip them.

 

Did the dealer reprogram or is this DIY?

Getting LT tires this weekend - I was curious the high pressure. My '13 would just say "A" tire was mis-inflated and never warned me about the LT tires over-inflating. As my '17 has individual pressures - I was concerned that the sensors may be more sophisticated and the higher pressure might trip something. Also, what pressure do you run in the LT's. And while I am asking questions - If I change over to winter tires & rims (More sensors >.<) Do the sensors need to be reprogrammed each season I switch them?

 

I run mine about 40 PSI never had my light come on when going from low temp to high temp. My wifes Pathfinder used to come on occasionally when we would hot the highway with it, even though the PSI was where it should be. Maybe one of your sensors is getting ready to die.

 

I run 46 in front, 42 rear, in my E load range LT rated BFG TA KOs. Never had a sensor trip for over pressure. With the OEM and these LTs, ive had sensors trip for being too low, though.

 

the 'register' of what is high and what is low pressure is in the tpms controller, not the sensor. I've yet to come across an OEM controller module that can be programmed to different pressures for alerts. (some of the aftermarket ones used on big rigs and rv's can be) The sensor programming wand only tells the controller that a sensor is live to marry the two and it's vehicle position if the controller module has that capability in reporting. From all I've seen, the Nissan tpms system goes to 65psi on the high side before setting a light.....

I run close to 50psi on all four when towing and no light has been set. My first inclination is to suspect a failing sensor battery or internal pressure contact in the stem. Most are centrifugally activated to send their signal as a way to extend the life of the coin battery buried inside.

 

The sensors on our trucks only detect low pressure situations. Every single time i go up to the mountains my light will go off if i spend the night.

 

Well, mine must be confused then. It is a 2004, the batteries are probably on their last legs, if not the sensors themselves. Personally, I wish I could disable the thing altogether in some way besides a piece of tape over the light! I'm really not so dumb that I need a computer to tell me I need to check the air in my tires - how did I ever exist for the previous 35 years?

 

I'm fairly certain the law wasn't imposed because of you, but here's some data from a couple of the dozens of studies that should make you wary of the 'other guys' who don't have your skills: The feature became standard on all 2008 and newer models, thanks to the TREAD Act that Congress enacted in 2000 after rollover incidents involving the Ford Explorer and Firestone tires. According to a survey released by the National Highway Traffic Safety Administration, 27 percent of cars and 32 percent of vans, pickups and sport utility vehicles had at least one tire that was under-inflated. Eight percent of light trucks and 3 percent of cars had all four tires under-inflated. A study by Schrader International, found that 42 percent of drivers are unable to identify the low-tire-pressure warning light on the instrument cluster. Roughly the same percentage of those polled admitted to rarely checking the tire pressure.

 

Rather than an indicator, then, how about a flashing "Your tires are underinflated" or similar? Using pictures only works if everyone understands what the picture is. I have to admit, when I bought my first Titan (in 2004), the first time that light popped up I had to pull out the manual to see what it meant - it didn't look like a low tire to me.

In any case, I'm not convinced that adding "safety" features makes people drive any safer. There are probably less deaths per mile driven, because of collapsible steering columns, crumple hoods, etc - things that my 67 Mustang didn't have - but more people drive crazy and distracted than ever because they believe the car will always save them. When you drove a 67 Mustang, with 4-wheel manual drum brakes, spear-o-matic steering column, and slice-you-in-half lap belts, with no head rests, manual steering, etc., you *always* drove safe because the car wasn't going to save you.

Whenever it's raining I see people flying by me at 75mph or greater. I asked my tire store about this one time and he told me people think the tires are better engineered so that you can drive faster in bad weather - true story, and this guy's been running a tire place for 40 years.

Anyway, I'm not against having information, I just want the ability to configure it so that I don't have to be aggravated by it. I had an S10 once that had this stupid "shift" light that would pop up whenever it wanted you to shift from 1-2, etc. It had no way of gauging whether I should shift other than knowing that if I shifted at low RPM I would be saving gas. It couldn't see that I was getting ready to climb a huge hill, where I'd be lugging the engine.

 

And by definition, more people can't identify the low pressure light than have low tire pressures, so the system cannot then make us any safer. It only adds to distraction rather than helping, according to your statistics.

I don't dislike the feature, though I would like the control to turn it on or off if I need to air down for sand or something, since I hate annoying lights and alarms.

 

Great information shared. . . . .

 

These sensors are crap. In the 9 years I've owned the T the light has been on for about 7, even shortly after installing new ones. Make sure the spare is fully inflated too cause it has a sensor.

 

Not in the '07 it didn't. As far as I know, the BCM has room to store only four sensors addresses. You can put a sensor in your spare if you want but the BCM will never read it if the other four sensors are already stored. This is for '04 through probably '12 vehicles.

I've had the BCM lose track of a sensor. Or maybe the sensor just wigged out. When I went through the relearn it picked it back up and stayed that way for quite a while.

There are DIY ways to do the relearn on the sensors. It isn't hard.

 

Search or look at the bottom of the page for more discussions on exactly what you're asking about

 

Mine comes on below freezing here in Maine, I'll get the pressures back up to 35 and the TPMS resets. When driving on the freeway no matter the time of the year the light comes on after an hour on the road. These are probably the original to the truck since my mileage is low for an 04. 117k.