today i drove down my street, relized i forgot my wallet and reversed back towards my house. about 30 ft and then my TSP (exclaimation mark light) comes on and then it does this long beeeeeep. i checked the tires and they didn't seem low or anything. anyone know what's wrong?

i did do some mods but nothing to do with wheels or suspension. i did just finish putting my engine back together, 4 days ago...

just to confirm: this is the TPS light right?

 

yes that's the TPS light

 

Yup. Guilty as charged

 

I have mine on too, thing is annoying...

 

tps is not just for low tire pressure, it also alerts you when one or more of your tires is over/underinflated. essentially, when one (or more) are different from the rest.

i'd check tire pressure again (not after driving because heat makes gas expand--so when its been parked for the night) and see which tire is to blame (usually front ones because of engine).

 

What's your tire's pressure at?

 

what jxanthony said but also check your alignment. Infiniti doesnt use individual monitors, it's based on over all rotational speed.

 

This is completely wrong. So is jxanthony's theory.

 

how come the 350z has a display that shows you the tire pressures, trip computer , mpg, and speedometer...etc. while we have nothing but lights?

 

Both front tires are at 32
Rears are at 33-34.

is that really enough to set the thing off? and does every experiance that beeeeeeeep when it first comes on??

 

I remember reading somewhere that the TPS on coupes set off around 32/33 PSI? Don't quote me on that but I've had my sensors kick off when I kept it at 32 on the front. Our 19" suggest 40 PSI max so I keep it at 38. Haven't had a problem for over a year now.

 

If I recall, recommended PSI for our tires are 36. TPS should trigger when pressure drops below 28 but remains on until pressure is increased past 32 or 34. Try increasing your tire pressure to 35 or 36 and drive it for about a mile. That should solve the problem, if not... perhaps the dealer needs to reset one of your monitors.

 

i've had my tps go off at 32 as well, try adding some pressure and keeping them 35-38.

 

The Tire pressure system warning gets tripped at 28 PSI or lower. I don't think there is any warning for too much tire pressure.

 

ok thanks guy i'll fill them up after work. What about that beeep? normal?