Tire pressure monitor failed?

I have a 2012 Honda Civic lx and the car is fine until I start driving it on the highway. I've had this car for four years and within that time I've replaced the tires twice and now when I'm driving on the highway the pressure light comes on. It's annoying and my tires are perfectly fine. My car has 60 thousand miles is it expensive to replace?

Check the tire pressure on your spare tire. Depending on the car there's a sensor on that too that monitors your pressure.

Talk with the service department at a Honda dealer, or go to a independent shop and ask them.

Did you recalibrate the TPMS after rotating tires or after airing them up? If not that is your problem.

Why don't you find out what the actual problem is first. Then you will know if it is expensive to fix.

While it might be a faulty monitor…

a) You've replaced the tires twice in only 4 years? That's a huge warning flag unless you are driving 25,000+ miles per year.

b) Are you sure the tires are "fine"? Does that mean the tire pressure has been checked and found to be within a pound or so of each other? Do you have an ACCURATE tire gauge? Cheap ones aren't accurate enough and neither are those on most filler pumps, especially the self-serve type.

c) Driving at higher speed causes the tires to heat up. This causes the air inside to get hot and expand, changing the tire pressure. This is why nitrogen is preferred for filling tires instead of plain air that contains moisture, which is what causes the greatest change in tire pressure between hot and cold.

d) So, get a good tire gauge or always have it checked by a tire shop and make sure you're running with nitrogen in your tires. The problem should disappear.

e) You really need to look into the cause of so much tire wear. Either you have been buying exceedingly cheap quality tires, you have poor driving habits that cause excessive wear, or you don't keep your tires properly inflated, or there's a mechanical problem such as improper wheel alignment, worn out shocks or some other issue.

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