Tire pressure display not working is a pretty common complaint I get from Toyota Lexus users. Upon further inspection, it turns out that the tire pressure display is constantly flashing a warning sign instead of blinking for a few seconds.
Your Lexus tire pressure display not working might be an outcome of a damaged TPMS module/ sensor. Also, the pressure display would act weird if you didn’t let the module relearn any new adjustments.
An user becomes more sure of a display issue when the tire has been inflated just right. But don’t worry. Over the years, I have found some easy and affordable ways to fix this problem. Let’s check them out.
What Causes Lexus Tire Pressure Display Not Working?
The Lexus tire pressure light blinking issue is due to low pressure in the tire. But if the light stays on nonstop, the tire pressure monitoring is the problem itself.
However, if you haven’t dealt with these warning lights before, you might think the display is not working right. So, just to be sure. Please check the tire pressure manually with the help of a pressure gauge.
If all four tires show an ideal range and the display still has a warning signal going on, it’s okay to suspect a faulty TPMS module. Here’s what causes such issues:
- Expired TPMS Battery
- Insufficient Voltage Supply
- Avoiding The Relearn Process
- Damaged TPMS Sensors
- Missing Tire Pressure
Troubleshooting And Fix For Tire Pressure Display Not Working Lexus
As I have said, it’s all good if the tire pressure monitor blinks for a couple of seconds. The problem arises when the display blinks or flashes without any problem with the tire’s pressure.
So, only blame the TPMS if you are sure about the tire’s pressure status. Now, let’s see how you can troubleshoot if the Lexus tire pressure display is not working along with the fixing ideas.
#1. Expired TPMS Battery Or Damaged Sensors- Replace It
It is a bit shocking for many users that TPMS batteries have a specified lifespan. It’s usually 7 to 10 years, depending on how much you use the car. After that, you need to replace it with a new one.
However, if you haven’t used the car for that many years, it might be some Lexus tire pressure sensor problems.
According to my experience, the heavy shift in temperature, wear and tear, and bone-jarring vibration are some of the reasons why the sensor might fail. I have even seen people damaging the TPMS sensors while repairing their tires at home.
The only thing left for you to do in this situation is to replace the old sensor with a new one. Follow my instructions on replacing a TPMS sensor:
- Get a new TPMS sensor with the same specifications mentioned in the manuals.
- Locate the sensor and detach it from the valve.
- Get a valve-puller and remove the valve as well.
- Apply a small amount of tire lubricant around the new sensor.
- Use the same valve puller to reinstall it into the valve hole.
#2. Insufficient Voltage Supply- Fix The Wire/Antenna
Insufficient voltage is another big reason that no one really talks about it. I admit it’s difficult to identify. You see, your TPMS sensor needs wiring and antennas to send signals to the main monitoring system.
However, corrosion or overheating can cause damage to it. So, before you remove and replace the whole sensor, consider this wiring issue as well.
If you have access to the tools, check the voltage inside these connecting wires through the voltage drop test. The reading should be 0.1.
I personally find it very tedious to fix the wiring without any professional help. It requires a thorough inspection, tools, and precision. I usually recommend taking help from a mechanic to reestablish the wires or antenna.
#3. Avoiding The Relearn Process- Reset The TPMS
Another thing DIY repairers mess up is avoiding the relearning process. Of course, you can inflate the tire by yourself. But what most people forget is that the TPMS sensor needs to be programmed through a tool. It’s called relearning.
Otherwise, the monitoring system won’t recognize the existence of these sensors, let alone warn you when something’s off.
To fix this issue, remove the tire you replaced recently. Detach the new sensor from the rim following the instructions I provided earlier. Get a TPMS tool and scan the sensor with it. Now, the module has relearned about the new sensor.
Again, the tires come with a pre-set standard of ideal pressure. If you intentionally decrease the pressure, the tire pressure display will showcase warning signs. Needless to say, you just have to reset the TPMS module.
There are multiple ways to get a Lexus tire pressure sensor reset. But here’s my favorite one.
- Turn the car’s ignition on. But don’t run it yet.
- Find the reset switch under your steering wheel.
- Press it for three seconds.
- Watch the blinking light disappear.
Now, run the car at 50mph speed for at least 20 minutes. It will reset the new pressure into your TPMS module as standard.
#4. Missing TPMS Sensors- Scan With A TPMS Tool
Have you installed the spare tire in an emergency? If yes, then the tire pressure monitor will show disrupted signals.
That’s because the spare tires don’t come with an attached sensor. I know most people have zero ideas about it. They start a road trip with the spare tire on. No doubt, the tire pressure display will blink since it can’t sense one of the four tires.
I recommend you don’t rely on the spare tires for too long. Just use it during the period your old tire is being repaired. After that, switch to the old tire, and please reset the TPMS module.
If you got a new tire entirely, and you are unsure whether it has a sensor, use a TPMS tool to find out. Just press the scanner on the sensor valve.
After a little wait, all the information regarding that tire (including pressure, temperature, voltage, ID) etc will show up. If the new tire doesn’t have the sensor, you won’t see any reading on the TPMS scanner. That’s a good way to find out.
Not every part of your Toyota Lexus is meant to survive decades. You need to inspect and repair some components from time to time to keep the vehicle running smoothly. The tire pressure module is just the same.
If you ever face the Lexus tire pressure display not working, please check the TPMS sensor battery life, wiring, and relearning status. If nothing works, you can always get a replacement.
Certification: BSc in Mechanical Engineering
Education: Mechanical engineer
Lives In: 539 W Commerce St, Dallas, TX 75208, USA
Rasel is an auto mechanic student and writer with over half a decade of experience in the automotive field. He has worked with top automotive brands such as Lexus, Quantum, and also owns two automotive blogs autocarneed.com and taxiwiz.com.