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Change flat tire. Tire sensor

256 Views 4 Replies 3 Participants Last post by C.sco, 3 d ago

soprano8406

Discussion Starter · 9 d ago

Has anyone replaced a flat tire and the sensor remain on saying it needs to be at 42lbs of pressure? It’s a brand new tire with air I drove around a lil and only shut car off once and turned on and sensor still on. Does it take a few days ?

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C.sco

· #2 · 9 d ago (Edited)

Is the flat tire still in the vehicle (like in the trunk)? If so, it could still be picking up that sensor. Your spare most likely doesn't have a sensor at all, so it thinks your flat tire is still there because it's getting a signal from it. Eventually your flat tire will realize it's not spinning, stop transmitting and go into standby. I think that can take a couple hours.

Edit: I read your post again and realized that you already replaced the flat with a new tire. Are you sure the tire shop filled it up all the way? Use a tire pressure reader to see. No, it does not take several days to read the most current pressure from that TPMS sensor, it should see it within a minute or two of driving around, and it will display -- for that tire if it goes for more than a few minutes without seeing it.

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soprano8406

Discussion Starter · #3 · 9 d ago

So I filled it to 42 and the filled all the other tires to the correct pressure 42 in back 39 in front and it shut off.

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tatsbyk

· #4 · 4 d ago

what I heard is you have to change all the tires if one is bad, something about the tires all spinning at the same time (with same treads)

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C.sco

· #5 · 3 d ago

tatsbyk said:
what I heard is you have to change all the tires if one is bad, something about the tires all spinning at the same time (with same treads)

That's sort of true, but not universally true.

What you want to avoid is having 1 tire with significantly more tread (which means more circumference) than the others, it puts strain on your drivetrain. But you can get away with just replacing 1 tire if your others are still relatively young (like under 10k miles or maybe even 20k miles if it's a long tread life tire), and another option is to replace the bad tire with a used tire that has similar treadwear.

I've used TireMart.com (previously called Bestusedtires.com) to buy a single tire before, with excellent results. You can often find the exact same tire with close to the same treadwear as your other tires, for substantially less money than buying a brand new set of 4 or 5 tires, especially when your other tires still have a lot of life left.

Also, since Wranglers aren't really "all wheel drive", you should be able to get away with different tread depths as long as the front pair match each other and the back pair match each other. It would only be problematic if you were driving in 4-High Parttime or 4-low on dry asphalt, which is not something you're supposed to be doing anyways.

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