Lexus is known for its luxury and reliability, and that extends to its warning lights. When you see a warning a “Check System” light comes on your Lexus is250, it can be difficult to know what exactly the issue is and can cause panic, fortunately, this is not as bad as it sounds.
In this article, I am going to talk about the Lexus “check system” fault’s meaning, cause, and how to reset it.
What Does Check System Mean on a Lexus Is250?
In short, the IS250 check system light indicates there is something wrong with the Tire Pressure Sensor (TPS) or one of the sensors on your vehicle is not working properly.
The TPMS is a system that monitors and alerts you if there is something wrong with your tires, such as low pressure or a flat.
When the light comes on this means that there is an issue with one of these systems and needs to be checked out by a professional.
What Causes the Check System Light to Come on a Lexus is250?
The main cause for this is a faulty Tire pressure sensor on one or more of your tires. The TPMS uses a sensor in each wheel to monitor the air pressure, temperature, and position of the tire.
If there is an issue with one or more of these sensors, then you will see the check system light come on.
Other Things that Can Cause your Is250 to display “Check System”
1. Low Tire Pressure:
If your tires are low on air, then this can cause the system to display “Check System.” The TPMS will not operate properly if there is too little air in the tires.
A good way to tell if this is caused by Low tire pressure is by inflating the tires to the recommended air pressure on the door placard and see if the light goes away, if not then you may need to replace the sensor or have it recalibrated.
2. Low Voltage Battery:
If the battery is low on power, then this can cause the system to display “Check System.” The TPMS will not operate properly if there is too little voltage in the system.
An easy way to tell if this is caused by a Low Voltage Battery is by checking your battery voltage with a Digital Volt Meter (DVM).
If it does not read at least 12.5 volts then you may need to replace your battery since this will cause other electronics to malfunction over time over time.
How to Reset the Check System Light on a Lexus is250
Now, that you know that this is caused by a bad tire pressure sensor. The first thing you want to do is figure out which TPS is failing and have it replaced.
I personally recommend that you replace all four sensors in order to cut out all the guesswork and prevent another Tire pressure sensor problem from happening in the near future.
If you have a Lexus is250, here are some steps you can take:
1) After Replacing the sensors then you have to reset the system, the easiest way to do this is by disconnecting the battery for 10-15 minutes. After that, reconnect the battery and start your car up.
This will reset the system and you can check all four tires to make sure they are at the correct pressure.
How Much Does it Cost to Replace Tire Pressure Sensors on an Is250?
The cost of replacing the tire pressure sensor on an Is250 is relatively cheap. You can get it done at any Lexus dealership for around $150-300 for all 4 tires, but you might be able to find a cheaper price online.
The part itself will cost about $20-40 per sensor and depending on where you live, the labor charge can range from $10-40 per tire.
Can You Drive a Lexus Is250 with the “Check System” message on?
Yes, you can still drive your Lexus Is250 with the check system message on. You just won’t be able to tell your tire pressure and can risk a tire blowout.
That is why I recommend that you get the tire pressure sensors replaced as soon as possible.
Can You Replace The Tire Pressure Sensors Yourself?
Yes, you can replace the tire pressure sensors yourself. It’s a relatively easy task and only takes about an hour or so to complete.
If you don’t feel like tackling this DIY job yourself then you can always take your car to a Lexus dealership and have them do it for you.
Here is a video on How to do it yourself.