So I finally have my first TPMS issue, 113K miles. The light came on...says low tire pressure on screen...I checked all tires, perfect. SCT X4 tire pressure settings are correct with what I'm running (65 front, 75 rear).
From what I understand, the SCT X4 cannot disable TPMS?? Anyone have any ideas other than hitting Discount Tire and paying money to get a new sensor installed?
Have you checked the spare tire? I'm at work offshore and my wife called me the other day to say that the tire pressure light came on and she had her dad air up the tires to 60 up front and 50 out back, However the light was still on. They never checked the spare so I'm wondering if that might be what it is. We had our 1st cold weather come through at the same time the light went off so I'm sure that's what it is.
The TPMS on the trucks are looking for something like 80psi rear and 65psi front, and trip at anything 15psi below those. That might be the issue for some of you guys running around 50ish
Mines always on now since I put 325/65/R18s on, just haven't made it to a dealer yet to get them to adjust them down
Did you figure out the issue? I just bolted my lift on and 35's aired to 45 front & 40 rear....flashed the computer with my X4 selecting 0 as my TPMS threshold and my warning light is still on too!
If you still have the sensors in the wheels the sct should turn off the light. I had to return my truck to stock and reload the tune about 5 times before it worked though. I dumped the sct for a mini max though and it works flawlessly
Before reading your post today, last night I decided to return the truck to the OEM tune. After the OEM tune was back in the ECU, I still had the TPMS warning on the dash because my tires were still aired to 45F/40R psi. I then aired my tires up to 65psi F&R (i.e. per Ford spec) and my TPMS warning went off, as it should. Now that I didn't have the TPMS warning on the dash, I then reloaded the SCT/5 Star Tune and selected 30 PSI F&R as my TPMS warning threshold. When that ECU load was complete, I started my truck and voila, the TPMS warning light stayed off. To date, I've driven the truck ~40 miles and it's still off so, I think the lesson that I may have learned is that you need to have a clean dash (i.e. no warning set) before you load a tune / change TPMS threshold parameters.
Hope that helps anyone else in the future with an SCT and the same issues we experienced.
if you still have sensors in the wheels then you probably wont have a light. My truck went 2+ weeks with no sensors before it finally set the light/message
Actually, you can set the TPMS setting in a SCT X4 to "0" and the tire sensor will not go off. I know this for a fact, as this is exactly how I turned mine off. I had the warning light (because my rims don't have sensors in them), I then set the TPMS on the SCT to zero psi for front and rear, no light. Never went back to stock, never did anything but load a tune with TPMS @ zero.
As you go to put a tune on you'll be prompted if you want to change anything. You can then set the TPMS setting to whatever pressure you want to run, or 0 pressure at all. There is no "Max and Min", just minimum.
FYI - I talked to the techs at SCT regarding the TPMS thresholds not working on my 2016. They said this is a known issue on the 15 and 16. Matter of fact I gave them a ton of info on my scanner including my stock programming because they haven't had the information needed yet to fix the 16's. So hopefully they will now have a fix soon. He was talking with one of the engineers while I was on the phone gathering everything they needed.
Like others on here, I tried 0, 30, 40, going back to stock with no tunes, with tunes and my TPMS light would not shut off and I got the low tire pressure message every time I started the truck.
He said if you follow their blogs they will report when the fix is out.
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