The TPMS (Tire Pressure Monitoring System) light is one of those dashboard warnings that's easy to ignore — but it's telling you something specific, and the message depends on exactly how the light is behaving.
Solid Light vs. Flashing Light: Two Different Problems
Solid TPMS Light
Meaning: One or more tires are at least 25% below recommended pressure. Check all four tires with a gauge. Inflate to the spec on the door jamb sticker. Light should clear after driving at 25+ mph for a few minutes.
Flashing Then Solid
Meaning: Sensor malfunction. The light flashes for 60–90 seconds on startup, then stays solid. This means a sensor isn't communicating — usually a dead battery in the sensor itself. Tires may be fine, but the monitoring system is offline.
Step 1: Check Your Tire Pressure First
Before assuming anything is broken, grab a tire pressure gauge and check all four tires. The correct pressure is on the driver's door jamb sticker — not the maximum PSI printed on the tire sidewall. Those are two different numbers, and using the tire's max PSI will over-inflate your tires.
Common correct pressures for most passenger cars in Southern California: 32–36 PSI. Trucks and SUVs often run 35–40 PSI front and rear. Always check cold — before you've driven more than a mile.
Why TPMS Sensors Die in SoCal
TPMS sensors have internal lithium batteries that aren't replaceable — when the battery dies, you replace the whole sensor. In Southern California, the heat accelerates battery drain. Sensors that might last 10 years in a cooler climate often need replacement at 6–8 years here.
Additional causes of sensor failure in SoCal:
- Corrosion at the valve stem from coastal salt air
- Sensor damage during a tire rotation or change done without proper tools
- Aluminum wheel corrosion seizing the sensor in place (requires drilling it out)
- Impact damage from a pothole
After New Tires: Why Your TPMS Light May Still Be On
This is one of the most common complaints we hear after a tire installation done elsewhere: "They put new tires on and now my TPMS light is on." The issue is almost always that the sensors weren't relearned — a process where each sensor is "introduced" to the vehicle's TPMS receiver after being dismounted and remounted.
At Ochoa's, we perform a full sensor relearn on every vehicle after installing new tires. If another shop skipped this step, bring it in — we'll relearn the sensors and clear the light.
Heads up: Some budget tire shops damage TPMS sensors during tire changes by using the wrong tools on the valve stem. If a sensor was cracked or broken during a tire change, it will need to be replaced. Always ask if a shop is experienced with TPMS before letting them touch your wheels.
Frequently Asked Questions
Will my TPMS light go off on its own after I add air?
Usually yes — after inflating all tires to the correct pressure (found on the door jamb sticker, not the tire sidewall), drive above 25 mph for a few minutes. Most TPMS systems will reset automatically. If the light stays on after correct inflation and driving, a sensor may be faulty.
Can I drive with the TPMS light on?
If the light is solid and came on because of low pressure, you should check and correct your tire pressure immediately — driving on significantly under-inflated tires causes rapid tire wear, overheating, and potential blowout. If the light is flashing (sensor malfunction), the tires may be fine, but you've lost your early warning system.
Does the TPMS light tell me which tire is low?
It depends on your vehicle. Some vehicles display individual tire pressure readings and highlight the low tire. Others just illuminate a warning light without indicating which tire. Check all four tires if your system doesn't specify.
Why did my TPMS light come on in cold weather?
Tire pressure drops approximately 1 PSI for every 10°F drop in temperature. On a cold morning in Long Beach — which can drop into the 40s in winter — tires that were borderline can dip below the threshold and trigger the TPMS warning. Inflate to the door sticker spec and the light should clear.
How long do TPMS sensors last?
TPMS sensors run on internal batteries that typically last 5–10 years. When the battery dies, the sensor cannot transmit — the light will flash and then stay on. Sensor replacement is the only fix when the battery fails.
Have this problem right now? Ochoa's Tire Service is open 7 days a week — no appointment needed for most services.