TPMS Problem

[eelynn08]

So I'm new to this forum because I just bought a 2007 Tahoe LTZ. I absolutely love it! Have picked a bunch of stuff but the TPMS I don't understand. I have relearned it and in the DIC it shows my tire pressures are all between 50 and 52 PSI. On the ID tag it says 30 psi for the tires and it should only read when your tires are 25% low. Max pressure on my tires is 50 psi. It continues to tell me that all the tires are at low air pressure. Somebody help me understand this?

 

[bill1013]

This is the tool I use (Amazon $13). When used as described in the owners manual it does the job. With that said you may have bad TMPS sensors, which you could ignore if you have a direct pressure reading gauge, until you find the correct replacements. You may want to disconnect the battery for around 15 minutes to let things settle and return to “normal “ when you reconnect the battery. Everything should return to original settings and you’ll need to reset the clock, stereo and such. Then try and relearn the TPMS as per the owners manual. Be patient and take your time, some can be touchy. Hold the tool against the tire above the valve stem. If they still won’t relearn then the next tire change get new TPMS Sensors that are for your model & year truck. Hope that helps.

Anyone else got any ideas? Aloha!!!

P.S. The previous owner might have used a tire sealant to slow leaks. The tire sealant ruins the TPMS Sensors and they need to be replaced. Plus when you break the bead of the tire it spews out and gets all over the place, so be careful. Also, inform the tire guy so he won’t get spewed upon. He/She will thank you.

 

[Fless]

Put a capable scanner on it and tell us what TPMS code is triggering the DIC message.

 

[Tonyv__]

So I'm new to this forum because I just bought a 2007 Tahoe LTZ. I absolutely love it! Have picked a bunch of stuff but the TPMS I don't understand. I have relearned it and in the DIC it shows my tire pressures are all between 50 and 52 PSI. On the ID tag it says 30 psi for the tires and it should only read when your tires are 25% low. Max pressure on my tires is 50 psi. It continues to tell me that all the tires are at low air pressure. Somebody help me understand this?

Prob not likely, But I know on the express van, you can change the desired tire pressure parameters. Mainly because the rear wheels call for 80 psi on the 2500s and up.


Previous owner could have changed these parameters for maybe off-road wheels or who knows.. You would need a tech 2 or higher end scan tool to access these settings.

 

[kbuskill]

The problem is your pressure is Too High. It doesn't just look for low pressure, it is looking for a range and you are well above that at 50 psi.

If 25% Range is accurate, 25% above 30 PSI would be 37.5 psi or higher.

As mentioned above, a Tech2 or other good scan tool can adjust the parameters it is looking for.

 

[Hey you]

I had tpms readings and failures for quite some time. But some where I read to keep reprograming with the tool and monitor pressures with guage.
After some time, the failures stopped, and the reading are accurate. I guess it's part of the learning process.