Does anyone have any data on exactly how much deviation will turn on the light (on a properly set up system)? If the sensors are really this sensitive, then I can quit checking pressure myself and just rely on the light, but if it takes a 20% reduction, then I'm still out there regularly with the gauge. . .

 

Is it safe to pump your tires to 40 or 50 psi? I think the recommended pressure is 33psi front and rear.

 

Well, I should caveat that I was told by the salesman that it would turn on if it is 1 pound plus or minus. I don't know that to be fact. Car salesmen sometimes don't always have the most accurate information on the product they sell. Such as when I had to show one that the Fit does keep an average MPG and not just the slide bar one.

 

According to the service manual, if the pressure in a tire drops below 25 psi (15" wheels) or 27 psi (16" wheels), then the low pressure indicator is set ON. If the pressure is increased to above 29 psi (15" wheel) or 30 psi (16" wheel), then the low pressure indicator is set OFF. So yes, it is a fairly narrow range, but that's probably a good thing. Seems like the most likely problem would be in very cold temperatures when the tire pressure is already a bit on the low side.

 

Reviving an old thread to see if the procedure in the OP actually worked for anyone. My light is already on, so why would I need to deflate the tire to trigger the light again?

 

Does it say TPMS or have the (..) indicator?

 

Just TPMS. It's a 2009.

 

Your TPMS sensor is fried and you will have to purchase a new one. From what I have noticed on the forum and having recently replaced one myself they tend to last around 4-5 years.

What I would suggest is finding a local tire shop that has a TPMS reset tool and they will be able to tell you which sensor has failed and from there you can purchase one online. The dealer charges way too much for this fix so it is better to go through a local tire shop instead

Here is one at our forum sponsor Bernardi parts:

42753-TR3-A81 | Honda SENSOR ASSY., TPMS - Bernardi Parts

 

I have 4 for sale. Contact me for more info. Here is the cheapest I found them:

 

Interesting.. Thanks for the wealth of information! Hopefully my tire guy can do this for me.

 

Not a bad price... I will let you know if I decide to fix it or live with it. Thanks.

 

So if the "TPMS" light comes on it means that at least one of the sensors is Fried? I can't check that it just needs to be reset? Every year at this point the (!) sensor comes on and I just inflate the tires... this time the "TPMS" one turned on and stayed on.

I'm guessing that it's probably best to just wait until my tire guy does my snows in a couple of weeks and see what he says.