Published by Rims & Tires
Compiled & checked by the site's publisher from manufacturer, NHTSA & USTMA data · Updated 2026-08-01
Your TPMS light (the horseshoe-shaped icon with an exclamation point) means one or more tires is significantly under-inflated, or the sensor itself has an issue. Most of the time it just needs air. Here's how to diagnose and fix it.
What triggers the TPMS light?
A tire that has dropped roughly 25% below the recommended PSI. That threshold comes from NHTSA's FMVSS No. 138, the federal standard that has required tire pressure monitoring on new passenger vehicles since 2008. If your door-jamb spec is 35 PSI, the light comes on around 26 PSI, which is already significantly under-inflated — the tire has likely been low for a while by the time you see anything.
A solid TPMS light means one or more tires is currently low. A flashing TPMS light (especially on startup) usually means a sensor malfunction, dead sensor battery, or a sensor that was lost during a tire swap and never recalibrated.
What should you do first when the TPMS light comes on?
Use a quality gauge to check all four tires cold (before driving more than a mile or two). Check the door-jamb sticker for the correct PSI — not the MAX on the sidewall. Inflate to spec.
After inflating, drive for a few minutes at highway speed. The TPMS light should go off on its own once the sensors register the correct pressures. If it stays on, one tire may still be low, or a sensor needs resetting.
West Georgia Local
Find the right shop near you
Tell us your vehicle and what you need — we'll match you with a vetted West Georgia shop. Free, no obligation.
Why does the TPMS light keep coming back?
Slow leak: a nail, screw, or valve stem leak is losing air gradually. Find a tire shop to inspect and repair before the tire is flat.
Temperature drop: tire pressure drops roughly 1 PSI for every 10°F drop in temperature. A cold snap can trigger TPMS on a tire that was fine in warmer weather. Inflate to spec and it will stabilize.
Dead TPMS sensor: sensors have batteries that last 5–10 years. Once dead, the sensor has to be replaced. That's normal maintenance on older vehicles.
Post-swap sensor mismatch: if you recently had tires swapped, rotated, or replaced, the TPMS sensors may need to be relearned to match their new positions. Most shops do this automatically, but not all.
Is it safe to drive with the TPMS light on?
Short distance at low speed: yes, as long as the tire is not visibly flat. Get to a station or shop within a mile or two.
Highway driving: no. Under-inflated tires build heat at highway speeds and can delaminate or blow out without warning. If the TPMS light comes on at highway speed, slow down and exit as soon as safely possible.
Frequently asked
Can I reset the TPMS light myself?
Yes. On most vehicles, after inflating all tires to spec, drive at 50 mph for 10 minutes and the system resets automatically. Some vehicles have a TPMS reset button (check your owner's manual). If it doesn't reset, a sensor issue is likely.
How much does TPMS repair cost?
Inflating tires: free or a few dollars at a gas station. TPMS sensor replacement: $50–150 per sensor installed, depending on the vehicle. TPMS relearn/reset after rotation: $10–30 at most tire shops.
Do I need TPMS on my vehicle?
Yes. TPMS has been federally required on all new passenger vehicles sold in the U.S. since 2008, per NHTSA's FMVSS 138 standard. It's a safety system, not optional equipment.
How often should I check my tire pressure so the light never comes on?
Once a month is the habit to build, plus before any long drive. Check them cold, first thing in the morning before you've driven far, since a few miles warms the air and reads high. Catching a slow drop early usually means topping off at the gas station instead of getting stranded on the shoulder.
Will a TPMS light fail a Georgia inspection?
Georgia doesn't run an annual safety inspection for most vehicles, so nothing official flags it. That cuts both ways: nobody catches an under-inflated tire for you either. A TPMS light is the only warning the car gives, so treat it as the inspection you're not getting.
Does the TPMS light mean I need new tires?
Usually not. Most of the time it just means a tire is low on air, and topping it off clears it. It only points to a tire problem when the cause is a slow leak from a nail or a bad valve stem, and even then that is often a repair rather than a replacement. A shop can tell you which in a few minutes.
Keep reading
Last updated 2026-08-01. General guidance only — confirm specifics with a local shop for your exact vehicle.