What Should You Do If Your Tires Keep Losing Air? 8 Ways to Find the Problem

Losing air from a tire is rarely a single problem. It can be a slow puncture, a leaking valve, a damaged wheel, or even a temperature change. Finding the cause early prevents a blowout and saves you from replacing a tire unnecessarily. Here are 8 practical ways to track down the leak, plus what to do once you find it.

What is happening

Tires naturally lose about 1 to 2 psi per month, but a faster drop usually means a leak. Leaks can come from the tread, sidewall, valve stem, valve core, wheel rim, or the bead where the tire meets the wheel. Temperature swings also change pressure: roughly 1 psi for every 10°F change. So a tire that reads low on a cold morning may not have a leak at all.

Emergency warning

If a tire is visibly flat, has a bulge, or you feel vibration or pulling while driving, pull over safely and call for roadside assistance or a tow. Do not continue driving on a damaged tire. A blowout at speed can cause a serious crash.

8 ways to find the problem

1. Check pressure when cold. Use a reliable gauge before driving. Record the reading. Recheck after a day or two. A drop of more than 2 to 3 psi in that time points to a leak.
2. Look for obvious objects. Run your hand (with a glove) over the tread and inspect between the tread blocks for nails, screws, or glass. Do not pull out an object that is sealing the hole; that can cause a sudden flat.
3. Inspect the sidewalls. Look for cuts, cracks, bubbles, or scuffs. A bulge means internal cord damage and the tire must be replaced, not repaired.
4. Test the valve stem and core. Remove the valve cap and put a drop of soapy water or spit on the valve opening. Bubbles mean a leaking valve core, which a shop can tighten or replace.
5. Do a soapy water test. Mix a few drops of dish soap with water in a spray bottle. Spray the entire tire, valve, and wheel rim. Bubbles show the leak location. This is the most reliable DIY method.
6. Check the wheel rim and bead. Corrosion or bends on the rim, or a dirty bead, can cause slow leaks. Look for bubbles along the edge where the tire meets the metal.
7. Submerge the wheel. If you can remove the wheel safely, a large tub of water will reveal bubbles from the smallest leak. This is the same method a tire shop uses.
8. Use a tire pressure monitoring system (TPMS). If your car has TPMS, note which tire triggers the warning. A single tire that keeps alerting is the likely leaker. Some systems show exact pressures, which helps you track the rate of loss.

What NOT to do

• Do not ignore a slow leak. It can become a blowout without warning.
• Do not overinflate a tire to compensate for a leak. Overinflation reduces grip and increases blowout risk.
• Do not use tire sealant as a permanent fix. It can damage TPMS sensors and is a temporary emergency measure only.
• Do not drive on a tire with a sidewall bulge or exposed cords. It is unsafe at any speed.

When to seek professional care

See a tire professional if you cannot find the leak, if the leak is in the sidewall or shoulder, if the wheel is bent or corroded, or if the tire has been driven flat. A shop can patch a puncture from the inside, replace a valve, or clean and seal a rim. Repairs are only safe in the central tread area; sidewall damage usually means replacement.

How to prevent it

• Check tire pressure monthly and before long trips.
• Rotate tires every 5,000 to 8,000 miles.
• Avoid curbs, potholes, and debris when possible.
• Replace tires when tread is worn or when they are more than 6 years old, even if they look fine.

Find the leak early, fix it properly, and keep a gauge in your car. If you are unsure, a quick visit to a tire shop is the safest next step.