Why Is My TPMS Light Flashing?
Complete Explanation
A flashing TPMS light means something different from a solid one. The pattern tells you exactly what the system is trying to communicate.
A TPMS light that flashes is not the same as one that stays on — and the distinction matters. The flashing pattern, its duration, and whether it eventually goes solid or goes off are all specific signals that tell you whether you are dealing with a pressure problem, a sensor failure, or a system fault. Most drivers do not know this, which is why a flashing TPMS light generates so many urgent searches. This guide covers every common flashing pattern, what each one indicates, and exactly what to do about it.
The Three Patterns
What Each TPMS Light Pattern Is Telling You
Flashes for 60–90 seconds at startup, then goes solid — most common
What it means: The TPMS system is signalling a fault or malfunction — not just a low pressure reading. The flashing sequence at startup is the system running its self-check and detecting a problem with one or more sensors. After the initial flash sequence, the light stays on solid to indicate an ongoing fault condition.
Most likely cause: A sensor has reached the end of its battery life and is no longer transmitting. This is the single most common cause of the flash-then-solid pattern, particularly in vehicles 5–7 years old with original sensors.
What to do: Have the TPMS system scanned to identify which sensor is not transmitting. Replace the failed sensor and perform a TPMS relearn procedure.
Light comes on solid — no flashing
What it means: One or more tires has dropped to 25% below the recommended cold inflation pressure. This is the standard low-pressure alert — the system has detected that a tire is underinflated and is alerting you.
Most likely cause: A tire has lost air — either from a slow puncture, natural permeation over time, or an overnight temperature drop in cold weather.
What to do: Check all four tires with a gauge. Add air to any tire below specification. The light should clear automatically after driving a short distance once the pressure is correct. If it does not, reset the TPMS system.
Light flashes continuously — does not go solid
What it means: Continuous flashing without settling to solid or off indicates an active system fault — typically a sensor that is transmitting intermittently (low battery, damaged housing, loose valve stem) or a module that is receiving corrupted signals.
Most likely cause: A sensor approaching battery end-of-life that transmits inconsistently. The module detects a signal sometimes and loses it at others, producing continuous oscillation in the warning light.
What to do: Treat this as a sensor failure in progress. Scan for fault codes to identify the affected position. Replace before the sensor fails completely to avoid a full dropout.
By Vehicle Brand
Brand-Specific Flashing Patterns to Know
Toyota / Lexus: Similar flash-then-solid pattern for system faults. Solid light only = pressure issue. Toyota's system often displays which tire is low on the multi-information display if equipped.
Ford / Lincoln: A "TPMS Fault" text message alongside flashing indicates a system-level fault rather than pressure. Ford's indirect TPMS requires recalibration after tire rotation (hold the reset button for 3 seconds with ignition on).
GM (Chevrolet, GMC, Cadillac): The information display often identifies which tire position is affected. A solid light on GM vehicles typically means one specific tire — check the display for position information.
After Tires or Rotation
Why Your TPMS Light Flashes After Tire Service
A flashing TPMS light after a tire rotation, new tire installation, or seasonal tire swap is common and almost always indicates that a relearn procedure was not performed after the service. When tires are moved to new positions, the TPMS module needs to re-learn which sensor is at which corner — without this, it generates a system fault because the sensor IDs no longer match the expected positions.
The fix in this case is a TPMS relearn procedure — not sensor replacement. Most vehicles require a specific relearn sequence (driving at a set speed for a defined period, or using a TPMS activation tool to signal each sensor in order). Refer to our TPMS reset guide for the process specific to your vehicle type.
Should I stop driving immediately when the TPMS light flashes?
If the light flashes then goes solid, you do not need to stop immediately — but you should check your tire pressures at the next safe opportunity. If the light came on suddenly while driving and you notice any change in handling or a vibration, pull over and inspect your tires before continuing.
Why does the TPMS light flash when it's cold outside?
Cold temperatures reduce tire pressure at approximately 1 PSI per 10°F of temperature drop. If tires are near the minimum threshold, a cold morning can push them below it — triggering the light. The light may come on as a solid rather than flashing in this case. Once the tires warm up during driving, it may go off on its own if pressure rises back above the threshold.
My TPMS light flashes for 60 seconds then goes off — is that normal?
A flash sequence that clears completely (goes off rather than going solid) is less common and may indicate a brief sensor communication issue that resolved itself. Monitor over subsequent drive cycles — if the pattern repeats consistently, a sensor is likely approaching failure and should be diagnosed before it fails completely.
Can I reset a flashing TPMS light myself?
You can attempt a reset using the TPMS reset button or settings menu — but a flashing light indicating a sensor fault will return immediately if the underlying sensor has failed. The reset only addresses calibration issues, not hardware failures. See our complete TPMS reset guide for step-by-step instructions.
For drivers who want real-time pressure data from a system that displays individual readings per tire — rather than a single light that only tells you something is wrong — an aftermarket direct TPMS system provides continuous monitoring with specific PSI values for every position.
Replace the single warning light with individual readings for every tire. Real-time pressure and temperature · All positions · From $119
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