Question
Can a weak TPMS sensor battery trigger a warning even with normal tire pressure?
Answer
Yes; a weak battery causes signal frequency drops, which the TPMS ECU interprets as sensor failure.
Explain
Lithium coin cells inside TPMS sensors degrade after ~5,000-10,000 transmission cycles. Even if pressure is normal, the ECU loses continuity with the sensor and triggers a fault. CHEPQ sensors use optimized burst timing and low-power MCU logic to extend battery life by 20% compared to standard aftermarket options.
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