it's just tire pressure not the end of the world! :P just got put some air in haha

 

No im not kidding...f'd up i know, but its the truth, i just figured it was from no pressure sensors, cause my center consol thing reads 0 pressure in all 4.

i dunno, just tire pressure, i still have 450hp goin to those wheels so they do the job.

 

Read your Owner's Manual FTW!!!

 

exactly... it *is* because you have no sensors in your wheels... the computer polls them periodicly and this is WHY the light comes on...computer polls...gets no response...sets off warning light... i'm just laughing because you actually got out to check your tire pressure when you had *no* sensors in them... *lol*

 

I think what hes confused about is that it doesnt come on in the beginning and it wont be on for a little while and then all the sudden come on. But ya i would just ignore it. Actually i went to my dealership and had them turn mine off.

 

+1. Mine does it also. I don't pay attention to it anymore.

 

This phenomenon happens in my 2003 Touring with only 2 sensors left. I've removed the other 2.

 

 

Agreed. The warning light does not come on because sensors are missing. If this were the case, it would come on during most of my daily small commutes. The APS system begins to register pressure withing the 1st few minutes of driving. If anything below 29 psi, give or take a couple, is detected it will trigger the light.

In the case we have described above, the light only comes on after continous driving for more than, let's say, 45mins or so.

 

let me explain how the sensors work... it's fairly evident that you're misunderstanding their operation... the TPMS consists of two transceivers...one being the sensor in each tire, the other being a sensor connected to your carputer... the carputer "polls" the sensors in your tire on regular intervals... if it receives a response back of "all good" (due to proper inflation/pressure), then you get no warning... if it polls and they register an improper pressure, then you get the warning... this happens if any individual one sends back a negative response...

but, when it polls the sensors and they are not there, it gives you the warning... even if you have two sensors, it's going to give the warning light due to the fact that it's only getting a reading back from two and is wanting a reading from four... this is a way for it to let you know that either a) you have one or more slack tires or b) you have one or more failing sensors... ask any tech or read your manual...

 

+1
The sensors are mounted inside the rims via the valve stem. They run on watch batteries and the batteries need to be replaced every few years.

 

If you more than five psi lower than 35psi the warning lindicators would go off as well as a beep indicator.
If just the warning light on the main cluster is on it could me tires pressure is to high or a malfunction. Check the psi and call your dealer. They have had a few calls regarding the internal psi indicators. Also take of the stems that came with the car.

 

Ur car is going to blow up. ^^ jk

 

wat the hell, how come my low pressure light never comes on ... it never came on when my tire pressure was so low that my wheel exploded on the freeway .. sigh. damn electronics.

 

I understand the theory of function on the APS system. I also understand the theory of a missing sensor causing the carputer's system to register an abnormal condition, hence lighting up the low pressure indicator. What I am saying, is that this does not happen on my 2003 Touring model. During small daily commutes, the carputer will register PSI readings for the 2 tires that have sensors. For the 2 other vacant slots, the display shows up as "----". No low pressure indicator light will emit on the dash. This condition will exist only during trips less than, let's say 45mins, in which I am sure the system has done plenty of polling.

It isn't until after 45mins or so, of driving, that the low pressure indicator illuminates. If it were the case that the low pressure illuminated due to the absence of a sensor, the carputer would have detected this long before 45mins of driving and would have illuminated the light within the initial polling process.

This is obviously a manufacturer defect within the system that may have been addressed in later models, but certainly not in my year/model.

VO(VO's intelligence has been insulted)

 

Maybe the light comes on for you, Val, because of a fault code listing. I suppose it could have a long timeout period before it illuminates the LED for the fault but I doubt it.

If the LED is illuminated because of a lack of pressure being registered in the two tires absent the two transmitters, then the system should emit the warning when no signal is sent. But that's just it. It probably behaves differently with a lack of signal than with a signal coding low pressure. It depends on the supervision (polling) time and that supervision time is obviously very quick, if not realtime, if I remember back to my 2003 performance model.

 

Now that makes a bit more sense. Thanks Jon

 

Eggmotherfukenzactly.

 

P.S: Fill them up to the recommended "cold" pressure (key) and drive around. The light will go away in a few minutes once the ECU senses that pressure is back to normal. The multi-display meter will also return to the default display.

This warning is very common in the winter months.