B Brown

Last fall I had a slow leak in my tire, after the 2nd day of putting air in it I dropped off at a tire shop, they removed the screw, fixed it and all was well. Later I started thinking I never saw the TPMS warning. I'm thinking maybe it's disabled. (could be a good thing) Then I read how you could change the set pressure using forscan. I had also bought a used set of 18" factory wheels for winter tires, got 4 new TPMS sensors off amazon had them mounted with new winter tires. I put the tires on the truck at home, didn't do a TPMS relearn, drove for a few miles, no TPMS light. I decided when I had forscan working I would look at it then. I finally got a chance to do it today. With Forscan in the BDYCM # 726-22-01, I have 0104 should be enabled, I used PID data and it see's the sensors, says it's enabled, and I lowered the pressure in the LR tire to 30, it saw the change and read 30.4 although it showed the LF changing. I drove around the block, a little over a mile and no warning. the TPMS pressure is at 35. Anybody got any ideas on why I have no warning light.

Ricktwuhk

You have not hit the threshold. 20% of 35 is 7, so around 28 it will alert. Also takes more than a mile of driving to activate sensors.

B Brown

I'll give it a try tomorrow

B Brown

You were right. Dropped it to 20lb. Got a warning. 1st time Ive seen it on my truck. Now for a new pressure gauge. My gauge and the sensors don't read the same at lower psi. But thats a different subject for another day. Thanks.