Hey all,

Anyone had a "-4 Inflate" message come up on their dash? Mine popped up this morning but all tires are showing 36psi.

Should I be concerned?

 

May want to check the inflation recommendations anyway. Under partial load the rears on many models are 2 or 3 psi less than the fronts recommended pressure level. So it is very possible it wants 39 or 40 in the fronts, but only say 36 or 37 in the rears. Can't remember but I think it has to be 2 or 3 psi off of the recommended pressure before getting the warning light. So even thought hey are all the same, your fronts may actually still need more air.

 

Makes sense! Ill inflate later and hope the warning goes away.

Thanks!

 

The display should also tell you which tire(s) needs to be inflated. Instead of looking at the absolute pressure display (i.e. 36 psi), switch the display to the "pressure deviation" screen, and it will identify which tire is down 4 psi. Then you simply add 4 psi to that tire, and you're done. Check your Owner's Manual for the specific procedure for your car, and for an explanation of why you should not be paying attention to the absolute pressure display when adjusting your inflation pressures.

 

more info here:
https://www.6speedonline.com/forums/...ml#post4770941

 

It can also be a sign that the battery in at least one of your TPMS is going, I have it on my 2014 Cayenne, the pressure in all tires is right but it still keeps thinking they're low (-4) in sequence starting at the RR then FR then FL then RL then a pause for a couple of weeks then it starts again.

 

Turns out it was just as I drove and dropped in altitude reducing the air pressure - put some more in and problem solved Thanks gang.

 

Hey Doug, how are you man? Came across your post while I was searching for the TPMS -4 inflate warning. Pan TPMS lit up after sitting in the garage for months now. Inflated all the tires to the right PSI but TPMS warning is still on. Do I drive it a few miles before the warning disappears? Or do I have perform a reset of some sort?

 

Driving a bit should take care of the warning, it will self clear

 

Thanks. You're right! Just a few hundred feet drive..light went away!