If you’re driving your 2015 Lexus RX 350 and notice the tire pressure warning light blinking on your dashboard, it can be confusing and a bit worrying. You might wonder if your tires are actually low or if something else is causing the warning.
Understanding why this light blinks—and what you can do about it—can save you time, money, and stress. You’ll learn the common reasons behind the blinking tire pressure warning, how to check your tires properly, and simple steps to reset or fix the system.
Keep reading to take control of your Lexus’s tire safety and avoid unexpected problems on the road.
Blinking Tpms Light Causes
The blinking Tire Pressure Monitoring System (TPMS) light on a 2015 Lexus RX 350 signals a problem beyond simple low tire pressure. This warning alerts drivers to issues within the TPMS itself. Understanding the common causes helps in quick diagnosis and fixing. The system relies on sensors inside the tires to monitor pressure continuously. Any fault in sensors or communication triggers the blinking light.
Below are the main causes that make the TPMS light blink on this Lexus model.
Sensor Battery Issues
Each tire sensor runs on a small battery. Over time, these batteries lose power. A weak or dead battery causes the sensor to stop sending signals. The TPMS light blinks to show the system cannot read the sensor data. Replacing the sensor battery or the entire sensor often resolves this.
Physical Sensor Damage
Sensors sit inside the tire and wheel assembly. Hitting potholes or curbs can damage these sensors. Physical damage blocks signal transmission or breaks the sensor. The system detects this failure and flashes the warning light. Inspecting sensors after impacts helps prevent this issue.
System Communication Errors
The TPMS uses wireless signals to communicate with the vehicle’s computer. Signal interference or software glitches cause communication errors. These errors make the system think a sensor is missing or malfunctioning. The blinking light warns about such system faults. Rebooting the system or performing a reset may fix communication problems.
Spare Tire Sensor Absence
Some spare tires lack TPMS sensors. If the spare replaces a regular tire, the system cannot detect its pressure. This absence triggers the blinking TPMS light. Installing a sensor on the spare or using a full-size tire with a sensor stops the warning.
Cold Weather Effects
Low temperatures affect sensor batteries and signal quality. Cold weather can reduce battery power quickly. It also weakens wireless signals between sensors and the vehicle. These factors cause temporary TPMS errors and blinking lights. The warning often clears once temperatures rise and batteries recover.
Checking Tire Pressure
Checking the tire pressure is a simple but important task for your 2015 Lexus RX 350. Proper tire pressure keeps your vehicle safe and improves fuel efficiency. The tire pressure warning light may blink if the pressure is too low or uneven. Regular checks prevent this problem and extend tire life.
Using A Tire Pressure Gauge
Use a tire pressure gauge to measure each tire’s pressure. Remove the valve cap and press the gauge firmly onto the valve stem. The gauge shows the pressure in PSI (pounds per square inch). Compare this reading to the recommended pressure listed on the tire placard inside the driver’s door. Adjust the pressure by adding air or releasing some until it matches the recommended level. Check all four tires for consistency.
Including The Spare Tire
Many drivers forget the spare tire when checking pressure. The spare tire also needs proper inflation to be ready in an emergency. Find the valve stem on the spare and use the tire pressure gauge as usual. Inflate the spare to the recommended pressure noted in your vehicle manual. Keeping the spare tire properly inflated ensures it will work correctly if you need it.
Diagnosing Tpms Problems
The 2015 Lexus RX 350 may show a blinking tire pressure warning light due to TPMS issues. Diagnosing these problems is key to safe driving. The TPMS alerts you when tire pressure is low or when the system has faults. Understanding how to find and fix these faults helps avoid bigger problems on the road.
Use proper tools and methods to check the system. Some issues come from bad sensors or communication errors. Correct diagnosis saves time and money. It also ensures the TPMS works correctly to keep your tires safe.
Using Diagnostic Tools
Specialized diagnostic tools read TPMS codes from the Lexus RX 350. These tools connect to the vehicle’s OBD-II port. They show error codes and sensor status quickly. Mechanics use these tools to spot which sensor or system part is faulty.
Diagnostic tools also help reset the TPMS after repairs. They confirm if the system works properly again. Without these tools, it is hard to find exact issues or clear false warnings.
Identifying Faulty Sensors
Faulty sensors cause the blinking tire pressure warning light. Sensors may fail due to dead batteries or physical damage. Inspect each tire sensor for damage or weak signals. A sensor with low battery will stop sending data.
Replacing or repairing bad sensors stops the blinking light. Regular checks prevent sensor failure. Keep sensors clean and avoid hitting curbs or potholes. Proper sensor function keeps your Lexus RX 350’s TPMS reliable.
Resetting The Tire Pressure Light
Repair costs can rise quickly if the tire pressure warning blinks on your 2015 Lexus RX 350. Spending smart saves money and avoids unnecessary expenses. Simple steps and choices help keep repair bills low. Understanding options lets you manage repairs better and protect your wallet.
Comparing Mechanic Quotes
Not all mechanics charge the same for TPMS repairs. Get multiple quotes before deciding. Ask for detailed costs, including parts and labor. Compare prices carefully to find the best deal. This helps avoid overpaying and ensures fair pricing.
Using Aftermarket Sensors
Aftermarket tire pressure sensors cost less than original Lexus parts. Many work just as well and fit perfectly. Check sensor quality and warranty before buying. Installing these sensors saves money while maintaining safety. Choose trusted brands to avoid future problems.
Knowing Your Vehicle Details
Learn your Lexus RX 350’s tire pressure specs and sensor type. Knowing this avoids buying wrong parts or tools. Check the owner’s manual or online guides for accurate info. This knowledge helps when talking to mechanics or shopping online. It prevents costly mistakes during repairs.
Frequently Asked Questions
Why Is My Tire Pressure Light Blinking On My Lexus?
A blinking tire pressure light on your Lexus usually signals a faulty or dead TPMS sensor battery. It may also indicate sensor damage or communication errors. Check all tire pressures first. If the light continues blinking, have a mechanic diagnose and reset the TPMS system to fix the issue.
Where Is The Tpms Reset Button On A 2015 Lexus Rx350?
The 2015 Lexus RX350 does not have a dedicated TPMS reset button. Reset occurs automatically after driving. Adjust tire pressures to recommended levels first.
Why Is My Tire Pressure Light Blinking But My Tires Are Fine?
A blinking tire pressure light often signals a faulty or dead TPMS sensor battery, sensor damage, or a system malfunction. Check tire pressure first. If tires are fine, have a mechanic diagnose and reset the TPMS to fix sensor communication issues.
How Much Does It Cost To Replace A Tpms Sensor On A Lexus Rx 350?
Replacing a TPMS sensor on a Lexus RX 350 typically costs between $100 and $250. Parts range from $50 to $100. Labor fees vary, often $50 to $150, depending on the shop and sensor programming needs. Prices may differ by location and service provider.
Why Is My 2015 Lexus Rx 350 Tire Pressure Warning Blinking?
A blinking tire pressure warning usually means a sensor issue or low battery. It can also signal a communication error in the TPMS system.
Conclusion
The blinking tire pressure warning on your 2015 Lexus RX 350 signals a sensor or system issue. Check all tires with a pressure gauge to ensure proper inflation. If the light continues blinking, visit a mechanic for a diagnostic test.
They can identify faulty sensors or reset the TPMS system. Ignoring this warning might lead to unsafe driving conditions. Stay attentive to your vehicle’s alerts for a safer, smoother ride. Regular maintenance helps keep your Lexus running well and your tires properly monitored.
