obviously one of the tpms is not working properly since the dash light is on, but the pressure is perfect.

Will the audible alarm still sound when the pressure is super low?? Or does the light mean the entire system is shot?

 

The Manual will spell out the working details of the TPMS, check it out. Best resource.

We elected to just disable them. Instead we apply due diligence in checking pressure and condition of our tires and getting spares and/or Tire Mobility kits. And most of all be always aware of where you drive, location, location.

To each his own though.

 

I had the same thing, one of your sensors is dead- Sewell Lexus sells them for about 70-80 bucks new make sure you get the CL discount.

 

I understand due diligence, and that has nothing to do with my question. I read the manual and the question still remains, hence I posed it here.

Still hoping someone knows.

 

The light means that one (or more) of the sensors (we don't know which one - Lexus feels that information is none of your business) is dead. It's no longer transmitting data.

If you have an under- or over-pressure situation in the tire with the failed sensor, the system will not alert you.

However, assuming the other 3 sensors are working, you should get the visual (blinking) and audible (bonking) warnings if one of those tires has their pressure go outside the limits.

 

if your sensors are programed, normally most of the time if it falls below 30psi then the light will go on.. if its still on then one of your sensors are bad. they have to hook up the scan tool and mess with the tire pressures to figure out which one is bad.. dropping one tires psi one at a time and looking at the screen to see which one is not reading

 

unplug the two places in center console and be done with it an save your money.
case close.

 

Perfect. Thank you both.

 

So, whats the final answer to the original question?
I have TMPS light on.
should I learn to ignore it (any benefits?) or just disable TPMS?
sorry, the responses are bit confusing me.

 

If the pressure is correct in your tires, it usually means one or more battery(ies) are going dead. They usually good for about +/- eight to ten years depending on temperature and usage. You have four sensors, one for each tire. They are color coded, so it's a one for one replacement of the unit, the battery is NOT replaceable.
A dealer can use their scantool to determine which one(s) are bad, but if it is a battery in one, it may be time to replace them all.
Or as others have suggested just disconnect the system. My admonishment would be it is a safety system. Would you remove seat belts or airbags if they annoyed you? And really important that you disclose this disconnection, if that's what you choose to do, if you sell the car. We live in a very litigious world.

 

I don't know where you live but a good tire shop should be able to tell you which sensor is bad and replace it. If you have Discount Tire in your area, they can do it cheaper than you can buy the part from Lexus.

 

The OP doesn't want to replace the broken sensor, but wants to know if the rest of three are still working by giving different visual/audible warnings.

That tpms disabling method was originally posted for those who had bought aftermarket mutil-piece wheels that were not tpms compatible at that time.

Nowadays, most if not all the high end mutil-piece wheels are made to be tpms compatible, so that method now is mostly for those who don't want to spend a fortune on the replacement sensors.

 

Well, I just left it. Lights on, all the time. But if a tire loses pressure then the audible beep still works so.

 

Talwang is right. But Prasha, the answer comes down to what you want to do, as it is your decision. Here are your choices as I see them:

<> Get the bad TPS replaced or repaired. (If you still have a warranty, the TPS is covered. Get it done for free.)
<> Disable the light by disconnecting the connector under the ash tray.
<> Ignore the light and hope that it burns out before it drives you bonkers.
<> Hold out until you need to replace the tires and have the TPS replaced/repaired then to save on the labor costs. (You can also change to another system at that time, like Orange Electronics.)
It's your choice.

Just a little more argument from the pro-repair/replace camp, these are low profile radial tires and are very difficult to visually tell when they have low air pressure without measuring. If you are not prone to check the air pressure fairly often, you should have the TPS replaced or repaired to save yourself a costly tire repair or an accident.

 

Thanks to VVTiBob, UnSub, and talwang for your responses.

I have 20" Enkei for 9/10 years, tpms has been working, now I assume one of the batteries in the tpms unit is dead, replacement cost of about $200 each, replacing 1 will not be enough about $1000 for all 4? I would rather be safe by kicking the tires regularly........

I will stop by the Tire shop to identify which one is not working(dead.)

If I do not disable tpms, do I assume that dashboard light which is now 'on' will flicker for any of the other 3 tires?