TPMS Light Flashing? Why It Blinks, Then Stays On, and How to Fix It
A lamp that flashes for about a minute, then stays on, means a TPMS fault, not a low tire. Gauge all four tires, then rule out dead sensors, spares and missed relearns.
A TPMS light flashing for about a minute, then staying on, isn’t saying a tire is low. It’s saying the tire pressure monitoring system has a fault and may not be watching your tires.
TPMS Light Flashing, Then Solid: A System Fault, Not a Low Tire
A TPMS light flashing, then staying steady, usually means a sensor isn’t reporting, a wheel has no sensor, or the receiver can’t hear one. On most cars, a steady lamp with no flash is the low-tire warning instead. Either way, gauge all four tires today; while the fault is lit, the car may miss a real leak.
In the US, FMVSS 138 sets the pattern for cars with one shared lamp: 60 to 90 seconds of flashing, then steady, at every start while the fault lasts. Manuals usually say “about one minute.” Other markets may differ, and a separate TPMS fault lamp may just stay lit.
Bulb check or fault flash?
A few seconds of light at start-up is just the bulb check. The fault flash lasts about a minute, so watch the lamp for 90 seconds after the next start.
Blinking mid-drive, or flashing and then going off
The system gets up to 20 minutes to spot a fault, so the blinking can start mid-drive. Since the lamp stays lit only while the fault exists, interference or a sensor battery weakened by cold can make it come and go.
On a car with one shared lamp, a steady light is the low-pressure warning; a steady lamp that spells out TPMS is a fault. Our TPMS light vs tire pressure light guide explains both symbols and how direct and indirect systems differ.
Check All Four Tires (and the Spare) Before Anything Else
With a TPMS light flashing, the system “may not be able to detect or signal low tire pressure as intended,” as US manuals must warn. Until it’s repaired, your tire gauge is your only low-pressure warning.
- Gauge each tire cold. Use the door-jamb placard, not the sidewall maximum, and don’t overfill: Toyota says pressure far above spec can keep its system from working properly.
- Look the tires over. A nail, bulge or cut matters more than any lamp.
- Include a monitored spare. Some cars also watch a full-size spare; if yours does, gauge it too, since a dead sensor in it can trigger the flash.
- Read the per-tire display. On Honda’s 2026 Pilot, one wheel stuck on “–” after a minute above 25 mph (40 km/h) points at that sensor; “–” on every wheel with an amber tire icon needs the dealer. The 2026 Hyundai Palisade shows no individual pressures during a fault.
Why the TPMS Light Keeps Flashing: Likely Causes First
Five causes cover most cases of a TPMS light flashing. The car’s age and any recent tire work usually point to the right one.
1. Sensor battery at end of life
Direct systems put a sensor with a sealed battery in each wheel. Aftermarket brand REDI-Sensor and tool maker Bartec put typical life at 5 to 10 years. The battery can’t be swapped, so the sensor is replaced.
2. A wheel with no sensor
Compact spares usually have none, and winter or aftermarket wheels lack them unless someone installed them.
3. A damaged sensor or valve
Impacts, corrosion, missing valve parts, careless tire mounting and liquid puncture sealant can all take a sensor out.
4. Sensors never registered
New sensors carry IDs the car must learn, and some cars relearn positions after a rotation; skip that and the system can’t work properly.
5. Receiver, wiring or interference
Less often, the receiver, its power supply or wiring fails. Between them, Toyota and Hyundai also list radio interference from towers, airports and chargers, plus some window tint, chains and packed snow or ice.
TPMS Light Flashing With the Spare Tire or Winter Wheels
A compact spare is a classic cause of a TPMS light flashing after a flat. The 2026 Hyundai Palisade owner’s manual says its spare has no sensor. After about 10 minutes above 15.5 mph (25 km/h) on it, the low-pressure lamp stays on and the fault indicator blinks for a minute, then stays on too. Put the repaired wheel back on and both should go off within a few minutes of driving.
Indirect systems, with no wheel sensors, can show a TPMS light flashing too: Honda’s 2023 HR-V flashes it for a fault or when a compact spare is on the car.
Winter wheels need sensors of their own
A winter set without sensors means a TPMS light flashing at every start, all season. Install sensors and have them registered; some cars, like the 2025 Camry, store two wheel sets. In the US, NHTSA has said a shop that knowingly installs sensorless wheels on a car with working TPMS breaks federal law.
Flashing After New Tires, a Rotation or a Puncture Repair
A TPMS light flashing within a day or two of tire work points at the work first, even if the lamp waited until mid-drive or the next start.
After a rotation or new tires
After new tires or a rotation, REDI-Sensor says a relearn is often the only repair needed. Some cars let you run it yourself: on the 2025 Camry it’s Vehicle Settings > TPWS setting > Tire Rotation, then 10 to 30 minutes of driving at about 25 mph (40 km/h) or more. Many cars need the shop’s tool, and Toyota warns sensors can be damaged during mounting, so go back to the shop first.
After new sensors
Each new sensor must be registered. On the Camry, the lamp blinks for about a minute, then stays on until registration finishes after a similar drive. That blink is expected; Toyota’s TPMS chapter has the steps.
After a puncture kit or sealant
Toyota warns liquid sealant may keep a sensor from working properly; Hyundai says unapproved sealant may damage one. Tell the shop, since Toyota says to replace the transmitter along with the tire.
What You Can Check Yourself vs What Needs a TPMS Tool
Steps 1 to 4 cost nothing. If you still see the TPMS light flashing at the next start, step 5 is a shop job.
Confirm the pressures
Gauge all four tires, plus a monitored spare, against the door-jamb placard.
Remove likely interference
Take off chains, clear packed snow or ice from the wheel wells and unplug add-on electronics.
Drive, then restart
Drive about 20 minutes, mostly above 25 mph (40 km/h), watching any per-tire display, then restart and watch the lamp.
Run your manual’s relearn
Only if your manual has one, like Toyota’s menu registration or the HR-V’s calibration (about 30 minutes of cumulative driving, not on the compact spare).
Shop with a TPMS tool
The tool triggers each sensor and reads its ID (and battery status, where the sensor reports it), programs any replacement and runs the maker’s relearn. If every sensor answers, the receiver and wiring are next.
Skip the popular non-fixes. Disconnecting the 12-volt battery can’t revive sealed sensor batteries (on the 2023 HR-V, reconnecting it can even light the indicator until a short drive), and no reset button brings back a dead sensor. You’ll just see the TPMS light flashing again at the next start.
Can You Drive With the TPMS Light Flashing?
Usually yes, with care, once a gauge shows all four tires at placard pressure. A TPMS light flashing doesn’t hurt the car; you’ve just lost the warning. Check pressures every few days and book the repair soon.
A flat or bulging tire, a thump, vibration or pull, or a reading well below placard means no more driving on it. Put on the spare or call for roadside help.
In Great Britain, a malfunctioning TPMS is a Major MOT defect on passenger cars first used from 1 January 2012. Disabling it isn’t a fix: US law bars shops from knowingly making it inoperative, and Hyundai warns tampering may void the warranty.
TPMS Light Flashing FAQ
Does a flashing TPMS light mean a sudden pressure drop?
No. On a car with one shared lamp, low pressure shows as a steady lamp; the minute of flashing means a system problem. A sensorless spare can trigger both, so gauge the tires either way.
Why does it flash only on cold mornings, or come and go?
An aging sensor battery is the first suspect: REDI-Sensor says extreme cold can keep one from working. A charger or nearby transmitter can cause it too. Seeing the TPMS light flashing only on some days still means a fault, so have a shop scan each sensor.
Can I replace a TPMS sensor battery myself?
No. It’s sealed inside the sensor, which is replaced and registered as a unit. If one died of age, ask the shop to read the others’ battery status too, where the sensors report it.
The Short Version: Gauge First, Then Find the Quiet Sensor
A TPMS light flashing for about a minute, then going solid, means you do the monitoring until it’s fixed. Gauge the tires, think about what changed, then let a TPMS tool find the silent sensor.
More car fixes are in Cars & Tech, including what to do when Android Auto keeps pausing your audio.
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