Driving with a faulty tire pressure sensor is not just dangerous, but also illegal. The sensor is a crucial part of your car’s safety system and it alerts you when the pressure in one or more tires is low. A malfunctioning sensor can lead to incorrect readings, which can affect your car’s performance and cause accidents. In this guide, we will go over how to fix tire pressure sensor faults so that you can drive safely and with peace of mind.
What is a Tire Pressure Sensor?
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A tire pressure sensor is a small device attached to the valve stem of each tire. It monitors the air pressure inside the tire and sends a signal to the car’s onboard computer if it detects any abnormalities. The computer then signals the driver through a warning light on the dashboard. This warning light can be in the shape of an exclamation mark or a tire symbol.
Why is a Tire Pressure Sensor Important?
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A tire pressure sensor is important for several reasons. Firstly, it alerts the driver to any changes in tire pressure, which can help prevent accidents caused by underinflated or overinflated tires. Secondly, it helps to improve fuel efficiency by ensuring that the tires are properly inflated. Overinflated or underinflated tires can cause your car to consume more fuel than necessary. Lastly, it helps to save money by extending the life of your tires. Tires that are underinflated tend to wear out faster and need to be replaced more frequently.
How to Check Tire Pressure Sensor
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Before you can fix a tire pressure sensor fault, you need to check whether the sensor is actually faulty. Here are the steps to check your tire pressure sensor:
- Park your car on a level surface and turn off the engine.
- Locate the tire pressure sensor reset button. This is usually located under the steering wheel, near the fuse box.
- Press and hold the reset button for a few seconds. The tire pressure warning light on the dashboard should blink twice and then go out.
- Start the engine and let it run for a few minutes.
- Check the tire pressure readings on the dashboard. They should be approximately the same as the recommended pressure for your car, which can be found in the owner’s manual or on a sticker located on the driver’s side door frame.
- If the readings are not within the recommended range, you may have a faulty sensor.
Common Causes of Tire Pressure Sensor Faults
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There are several reasons why a tire pressure sensor may be faulty. Here are some of the most common causes:
- Low battery: The tire pressure sensor is powered by a battery, which can run out of charge over time.
- Corrosion: The sensor is exposed to the elements and can become corroded over time.
- Physical damage: The sensor can be damaged if it comes into contact with road debris or if the tire is punctured.
- Calibration issues: If the tire pressure sensor has not been calibrated correctly, it may give incorrect readings.
- Electrical issues: The wiring or connections between the sensor and the car’s onboard computer may be faulty.
How to Fix Tire Pressure Sensor Faults
If you have determined that your tire pressure sensor is indeed faulty, here are some steps you can take to fix it:
Replace the Battery
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The battery in the tire pressure sensor can be replaced easily. Here are the steps to follow:
- Remove the sensor from the tire valve stem.
- Open the sensor using a small flathead screwdriver.
- Remove the old battery and replace it with a new one. Make sure the battery is installed correctly.
- Close the sensor and reinstall it on the tire valve stem.
- Reset the tire pressure sensor system as outlined in the previous section.
Clean the Sensor
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Corrosion on the sensor can be cleaned off with a soft-bristled brush and some rubbing alcohol. Here are the steps to follow:
- Remove the sensor from the tire valve stem.
- Dip a soft-bristled brush in rubbing alcohol and gently brush the sensor.
- Let the sensor dry completely before reinstalling it on the tire valve stem.
- Reset the tire pressure sensor system as outlined in the previous section.
Replace the Sensor
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If the battery and cleaning do not work, you may need to replace the tire pressure sensor. Here are the steps to follow:
- Purchase a new tire pressure sensor that is compatible with your car’s make and model.
- Remove the old sensor from the tire valve stem.
- Install the new sensor on the tire valve stem.
- Reset the tire pressure sensor system as outlined in the previous section.
Conclusion
A faulty tire pressure sensor can be dangerous and costly if not addressed promptly. By following the steps outlined in this guide, you can fix the sensor yourself or take it to a professional mechanic. Remember to check your tire pressure regularly and keep your car’s safety system in good working order.
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