I got a new warning on my dash during a colder day in Texas… two of my TPMS sensors went off. I understand that cold weather can affect tire pressure, but as I drove to work, the pressure went up and the warnings didn’t go away. The other two tires showed similar pressure but didn’t trigger any alerts. All four tires fluctuated between 29 and 31 psi, but only the two sensors kept showing warnings. This morning, the same two sensors still had a yellow warning even though all four tires had the same pressure. Could the batteries have died at the same time? Do I need to reset them manually? Has anyone experienced this with their EV6 or Kia TPMS system?
Once you get those alerts, you need to pump them up past 36 psi to clear the warning.
Christopher said:
Once you get those alerts, you need to pump them up past 36 psi to clear the warning.
Thanks, that makes sense. The tire shop usually says to drive a bit and the sensors reset, but if it’s under 5psi low, that would be a bigger issue.
Christopher said:
Once you get those alerts, you need to pump them up past 36 psi to clear the warning.
Now I wonder why the other two didn’t trigger. Maybe the limit is 28 psi, and they didn’t go that low?
@Keir
It could be that the pressure is just slightly below 30, like 29.8 or 30.3. The software might trigger a warning at <30 psi due to rounding.
@Keir
For me, it was 27 psi and I spent hours figuring out that I had to air them up past 36 psi to clear the warning.
Tire pressure should be 36 psi, even before you start driving.
Arin said:
Tire pressure should be 36 psi, even before you start driving.
That would explain it. I’ve been a bit careless with maintenance this summer. It’s strange that all four were at 30 psi (and 29 during my commute), but only two triggered. I’ve always used 35 psi, but since only two triggered, I thought 30 would be fine for the EV tires.
@Keir
I’d recommend slightly overinflating. I had the same issue. I inflated them to 36 psi, but the warning light stayed on. Someone on here told me I needed to go to 37 psi to clear the warning.
30 psi is really low. As others mentioned, 36 psi is the correct pressure, and it should be measured when the tires are cold.
Tires can lose up to 1 psi per month, but my EV6 tires usually go two months between top-ups. I use a pancake compressor to keep them at 36 psi.
Don’t forget about your spare tire too .
@Zuri
Thanks for this info. I didn’t realize tires could lose that much air each month. I also haven’t been checking them since I got the car. It seems I need to invest in a compressor. Could the OEM tires be causing more air loss?
@Keir
OEM tires don’t leak more than any other brand. Losing 1 psi per month is normal. You probably got your car with less than 36 psi already. Check the recommended pressure on the sticker on the B pillar when you open the driver’s door.
@Keir
I have one of these in my garage and use it to top off my tires. It works great.
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Sparrow said:
@Keir
I have one of these in my garage and use it to top off my tires. It works great.
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@Keir
The OEM tires are no different from any other brand. In two years with mine, I rarely had to add air. Temperature has a much bigger effect on tire pressure changes.
Ezra said:
@Keir
The OEM tires are no different from any other brand. In two years with mine, I rarely had to add air. Temperature has a much bigger effect on tire pressure changes.
That makes sense. I haven’t had to check tire pressure before, probably because the oil changes topped them off. I live in Texas, and the temperature here only fluctuates between 85-100°F in the summer. I assumed everything was fine, but those warning lights were my wake-up call.
If the pressure hits the low threshold, it has to go above the ‘ok’ threshold to clear. There’s a dead zone in between.
Tires that never hit the low mark won’t trigger warnings, but tires that have hit it will.
@Ashby
I never go to gas stations for air, except for a quick stop at Buc-ee’s. Since my car is new, I assumed the tire pressure was fine and didn’t check. But now I know I need to keep an eye on it.