Dash error icon come on.

Hi guys so my truck been giving me this error on dash broad for couple days now, start flashing then stay on. I have put 42psi on my Ko2 305 on all 4 tire and do a reset. It been doing this after I drive for couple miles and it start flashing and stay on.

 

You are using reset button on lower console?
If that isn’t working you likely have a tpms sensor out in the valve stem in the tire.

 

Don't forget the spare

 

^ This. Or you have a sensor that the battery has given up the ghost

 

That looks like Low Tire pressure.

 

Yea the rest button under lower console. So i put in some air on 4 tire at 42psi last night and I just checked my air pressure this morning on my tire and all 4 showing at 40 psi. It’s 51 degree here in Cali this morning.

 

Geezus, 42 PSI?

 

What should it be?

 

Oh the spare have sensor?

 

If this is the first time you've had this issue in the 6-year history of the truck, it's most likely that at least one of the batteries in the TPMS sensors has died.

 

If OP has aftermarket tires, this isn't outside the realm of possibility.

OEM PSI can be found along the door jamb. If aftermarket, you'll need to look at their website specifications.

 

Yes and there is a reset button for it.
If it doesn’t work then the issue is downstream in the sensor.

 

lol

 

Ive seen a few posts where pressuring being too high causes the TPMS error light as well.

Typically I believe most run around 35psi.

 

OEM PSI in the door jamb can go out the window with E load rated tires.

 

Right. Hence, why I specified the aftermarket's website specifications because OEM is not E load rated.

 

KO2 shouldnt need PSI that high. You should be around 35 for maximum contact and not wearing the middle of the tire.

 

Are your tires warm when you filled to 42 psi? Psi should be checked on a cold tire. Mine can see 3+ psi increase from cold after a drive. If you're airing up to 42 on a warm tire, I'm not surprised you're at 40 the next day on a cold tire.

Note: I don't know what the tpms delta is from its set point to when it alerts you of low psi. 2 psi seems a bit low to trigger an alert.

 

i see as much as 8 psi delta from a cold to hot tire in cali, but my truck sits for at least 4 days a week straight.

 

As others have said check the spare…..

 

I want to say when the pressure drops below 28-30. Can’t remember the exact value.

 

You could always swing by discount tire or any tire shop and they can quickly scan the sensors and tell you if one is dead and not transmitting, and which one it is. Just a thought.

 

Thank guys I just use techstream and showing a bad sensor. But damn everytime read data to find out which one is bad the software crash.