I finally had it with my TPMS warning light coming on every time the outside temperature dropped. My dealership wanted $20 to lower the set point, but who needs them. This is what I did:

I decided to make the reset point 28PSI, but you can go lower for colder climates.

1. Lower the tire pressure in all four tires to 28PSI cold tire pressure (or what ever you want).

2. Start the car and leave in PARK with the Emergency Brake set.

3. Press and hold the SET button (see attachment), which you will find underneath the driver side dash pointing down toward the car floor (I got on my back underneath the dash to find it), until the TPMS low pressure light (located inside the RPM cluster) blinks three times and the Multi-information display says PRESSURE INITIAL. If this does not happen, repeat this step again until it does. Do not turn off the car (initialization is not through).

4. Keep car running (around 15 - 20 minutes) until the initialization is complete (TPMS warning light goes out). then turn off engine.

5. Wait to make sure tires are again at ambient temperature (especially if you drove the car during reset), then inflate all four tires to what ever pressure you want (I set them to 36PSI cold tire pressure).

Hope this helps and I'm not repeating a prior thread on this.

 

Nice to know...

 

+1!

 

thanks for sharing!

 

tires lose 1lb of pressure for every 10° drop in ambient temperature.
I go through this every winter in New England.

you can always add air to the tires too.

steviej

 

so in your example above, if the PSI drops below 28, your warning will turn on? Just wnat to confirm.

 

I tried this the other day, however, I did not have my ebrake on and I didn't leave it running for 20 minutes(wasn't trying to waste gas), Needless to say, it did not work, I guess I will try the correct steps this time.

 

Simpler solution, I just add extra air when it starts to get colder.

 

i wonder if i can lower it to zero cause i dont have tpms on my new rims...

 

I just got my 2010 a few weeks ago and was totally dumbfounded to find out that there is not a way to actually display the tire pressure in each tire. Nothing is more irritating than for the light to come on if you are driving and you don't know if it's gone flat or still has 25 #'s in it.

In fact, I consider it a safety factor because you don't know whether to pull off the road or just keep driving until you find a safe place to check them.

 

I agree. Even my bottom-of-the-line Chevy Silverado truck displays the tire pressure.

 

i just treid it with the tpms just sitting in my trunk ...and whatever i do it just says low tire pressure i guess you cant set it a zero

 

indeed, i think lexus is lacking. ls460 shows the exact tire pressure, but not the location. some other brands show a lot more information

 

Great information...thanks for sharing!

 

I hope this works in an 07 RX 400H, that warning is driving me nuts.