A Tire Pressure Monitoring System (TPMS) is a crucial safety feature in modern vehicles, designed to alert drivers when the tire pressure in one or more tires falls below the recommended level. However, sometimes the TPMS sensor may display a reading that is higher than the actual tire pressure, which can be a cause for concern. In this comprehensive guide, we will explore the common causes of a TPMS sensor reading high and provide step-by-step troubleshooting tips to help you resolve the issue.
Causes of TPMS Sensor Reading High
- Calibration Issues:
- TPMS sensors are factory-calibrated to provide accurate readings within a specific pressure range.
- If the sensor is not calibrated correctly, it may display a higher reading than the actual tire pressure.
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This can be due to a faulty sensor or improper installation during a tire change or other maintenance.
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Atmospheric Pressure Changes:
- The TPMS sensor measures the tire pressure based on the surrounding atmospheric pressure.
- At higher elevations, the atmospheric pressure is lower, which can cause the TPMS to read higher than the actual tire pressure.
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This is a common occurrence when driving in mountainous regions or areas with significant changes in elevation.
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Sensor Malfunction:
- The TPMS sensor itself may be malfunctioning, leading to inaccurate readings.
- This can be caused by physical damage to the sensor, such as during a tire change or other mechanical work.
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Sensor malfunctions can also be the result of internal electronic issues or battery failure.
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Incorrect Tire Pressure:
- If the tire pressure is not set to the recommended level, the TPMS sensor may display a higher reading than expected.
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This can happen if the tires were recently inflated to a higher pressure, or if the recommended tire pressure has changed and the TPMS system has not been updated.
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System Reset Issues:
- After a tire change or other maintenance, the TPMS system may need to be reset.
- If the reset process is not performed correctly, it can lead to inaccurate TPMS sensor readings, including a higher-than-expected reading.
Troubleshooting TPMS Sensor Reading High
- Check Tire Pressure:
- Use a reliable tire pressure gauge to verify the actual tire pressure in each tire.
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Compare the readings from the tire pressure gauge to the TPMS sensor readings.
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Reset the TPMS System:
- Consult your vehicle’s owner’s manual for the specific instructions on resetting the TPMS system.
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Ensure that the reset process is performed correctly, as any errors can lead to inaccurate TPMS readings.
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Inspect the TPMS Sensor:
- Visually inspect the TPMS sensor for any signs of damage, such as cracks, dents, or corrosion.
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If the sensor appears to be damaged, it may need to be replaced.
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Consult the Owner’s Manual:
- Refer to your vehicle’s owner’s manual for detailed information on the TPMS system, including calibration procedures and troubleshooting steps.
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The manufacturer’s recommendations can provide valuable guidance in resolving the high TPMS sensor reading.
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Seek Professional Assistance:
- If the issue persists or you are unsure of the root cause, it’s best to consult a professional mechanic or the vehicle’s dealer.
- They have the necessary tools, equipment, and expertise to diagnose and address the problem effectively.
Technical Specifications of TPMS Sensor Reading High
- Pressure Range: TPMS sensors typically measure tire pressure within a range of 20-50 psi (138-345 kPa).
- Accuracy: TPMS sensors are designed to provide accurate readings within 1-2 psi (7-14 kPa) of the actual tire pressure.
- Reset Procedure: The reset procedure for the TPMS system varies by vehicle make and model, so it’s essential to consult the owner’s manual for specific instructions.
Conclusion
A TPMS sensor reading high can be a frustrating issue, but with the right troubleshooting steps and understanding of the underlying causes, you can effectively resolve the problem. By following the guidelines outlined in this guide, you can diagnose and address the high TPMS sensor reading, ensuring your vehicle’s safety and optimal tire performance.
References:
- https://www.4xeforums.com/threads/tpms-reads-higher-than-hand-gauge.4722/
- https://acurazine.com/forums/5g-tlx-tires-wheels-suspension-421/can-tpms-calibrated-reading-too-high-psi-942526/
- https://www.hellcat.org/threads/tpms-reading-high-after-tire-change.235261/
- https://www.silveradosierra.com/threads/tpms-sensor-reading-high-help.397089/
- https://www.tacomaworld.com/threads/tpms-reads-5-psi-high-on-all-corners.429423/