Tire Pressure and TPMS: How to Check, Fill, and Fix the Warning Light
Find the right pressure
Use the tire placard on the driver's door jamb or in your owner's manual. Don't use the number molded into the sidewall. That's the tire's maximum pressure, not the recommended pressure.
How to check
- Check "cold," before driving or after the car has sat a few hours.
- Remove the valve cap, press the gauge on firmly, and read it.
- Inflate or deflate to the spec, and recheck. Don't forget the spare if you have one.
- Check monthly and before long trips. Pressure drops as the temperature drops.
Why the TPMS light comes on
- Solid light: one or more tires are low. Check all four.
- Flashing, then solid (on many vehicles): a fault in the TPMS system, such as a dead sensor battery or a sensor that wasn't relearned after a tire rotation.
- Some vehicles need a relearn procedure after rotation or sensor replacement, done with a TPMS tool or a scan tool. See our scanner guide.
| Product | Best for | What to look for | Price |
|---|---|---|---|
| Digital tire pressure gauge | Accurate readings | Easy-to-read display, good valve seal | Check current price at your retailer |
| Portable tire inflator | Topping off at home | Auto shutoff, cord or battery power | Check current price at your retailer |
| TPMS relearn tool | Rotations and new sensors | Coverage for your vehicle | Check current price at your retailer |
| Tire plug kit | Emergency puncture repair | T-handle tools; a plug is a temporary fix, so get the tire inspected | Check current price at your retailer |
Research-based roundup of product categories. We have not lab-tested these products. Confirm specs and fitment on the retailer's listing.