Will a Tire Pressure Sensor Fail Inspection?
The tire pressure monitoring system (TPMS) is a critical safety feature in modern vehicles, designed to alert drivers when tire pressure is too low. This system helps ensure optimal tire performance and safety by preventing blowouts, improving fuel efficiency, and enhancing overall vehicle control. However, one common question many car owners have is whether a faulty tire pressure sensor could cause a vehicle to fail an inspection. In this article, we’ll dive into the details of TPMS inspections, what can cause them to fail, and how it affects your vehicle’s inspection results.
What is a Tire Pressure Monitoring System (TPMS)?
A Tire Pressure Monitoring System (TPMS) is a safety feature found in most modern vehicles. It monitors the air pressure in your tires and alerts you if one or more of them are under-inflated. The system uses sensors located in each tire or the vehicle’s ABS system to send data to the car’s computer. If the pressure in any tire drops below the recommended level, a warning light will appear on your dashboard.
Does a Tire Pressure Sensor Affect Vehicle Inspections?
In most states, vehicle inspections are required to ensure that your car meets safety and environmental standards. These inspections often check for issues like emissions, brake performance, and tire condition. As for the TPMS, it does not typically fail an inspection based on its functionality alone. However, if your TPMS warning light is on, it could indicate a problem, which might lead to a failed inspection depending on local regulations.
1. TPMS Light On During Inspection
If your TPMS light is illuminated, it usually signals a problem with the system, such as a faulty sensor, under-inflated tires, or a malfunctioning warning light. In some states, an illuminated TPMS warning light can result in a failed inspection, as it may indicate a safety concern.
Common Causes for TPMS Failure During Inspections
Several factors can cause a TPMS to fail an inspection. Here are some of the most common issues:
1. Faulty TPMS Sensors
Each tire has a sensor that detects air pressure. If one of these sensors is damaged or malfunctioning, it will trigger the TPMS warning light. A failed sensor might cause the system to give false readings or not register tire pressure at all.
2. Low Tire Pressure
Sometimes, the TPMS light will turn on because one or more tires have low air pressure. If this is the case, simply inflating the tires to the correct pressure may resolve the issue and prevent a failed inspection.
3. Dead Battery in TPMS Sensor
Each TPMS sensor is powered by a small battery. Over time, the battery in the sensor can wear out, causing the sensor to stop working properly. If the battery fails, the sensor may need to be replaced, which could cause a failed inspection.
4. Faulty TPMS Control Module
The TPMS control module is responsible for communicating with the sensors and providing the data to your car’s dashboard. If this module malfunctions, it may prevent the system from working correctly, leading to a failed inspection.
Can You Pass Inspection with a Faulty TPMS?
In some states or regions, a vehicle may still pass inspection even if the TPMS light is on, provided that the vehicle meets all other inspection criteria. However, this is not always the case, and it’s important to check with your local inspection station to see the exact rules in your area. In some places, you may be required to fix the issue before the car can pass the inspection.
How to Fix a Faulty TPMS
If your TPMS is not functioning properly, it’s essential to address the issue before your inspection to avoid the possibility of failing. Here are a few steps to help resolve common problems:
1. Check Tire Pressure
Ensure that all tires are inflated to the recommended pressure. If the pressure is low, inflate the tires, and the warning light may turn off.
2. Replace Faulty Sensors
If one of your TPMS sensors is damaged or malfunctioning, it may need to be replaced. A mechanic or tire specialist can help you identify the faulty sensor and install a new one.
3. Replace the TPMS Control Module
If the TPMS control module is the source of the issue, it may need to be replaced. This is a more complex repair and should be done by a professional mechanic.
4. Reset the TPMS
Sometimes, the TPMS needs to be reset after a sensor replacement or tire rotation. Consult your vehicle’s manual or a mechanic to perform this reset.
Frequently Asked Questions (FAQs)
1. Can I still drive my car if the TPMS light is on?
Yes, you can drive your car with the TPMS light on, but it’s not recommended. A malfunctioning TPMS can prevent you from noticing low tire pressure, which could lead to a flat tire or other safety issues. It’s best to address the issue as soon as possible.
2. How much does it cost to replace a TPMS sensor?
The cost of replacing a TPMS sensor can vary depending on your vehicle’s make and model, but it typically ranges from $50 to $150 per sensor, including labor. If more than one sensor is faulty, the cost may increase.
3. Can a TPMS light be reset without fixing the issue?
Yes, the TPMS light can be reset temporarily, but if the underlying issue isn’t fixed, the light will likely turn back on. It’s important to diagnose and repair the cause of the warning light to ensure your vehicle’s safety.
4. Will my car fail inspection if my TPMS light is on?
In some areas, yes. If your TPMS light is on, it could indicate a problem that may result in a failed inspection, especially if the issue is related to tire safety. However, this depends on local inspection regulations.
Conclusion
A faulty tire pressure monitoring system can potentially cause your car to fail an inspection, especially if the TPMS warning light is illuminated. If you notice that the TPMS light is on, it’s important to get the system checked and repaired before your inspection. Whether it’s due to low tire pressure, a malfunctioning sensor, or a dead battery, addressing the issue will help ensure that your vehicle passes inspection and remains safe to drive.
