low tire pressure alert, not clearing right away

[gknyce]

Odd scenario (and full disclosure, did not consult the manual) - got a low tire pressure alert, first one ever, said the driver-side tires were at 29 and 30psi. I tested them all and filled them up to 35-36 per spec. Oddly, the car recognized the new values, but would not automatically clear the alarm. I rebooted the head-end, no change. I drove around the block (figureatively) and got it above 45 mph (there was a speed threshold in my old G35), no change. It _finally_ cleared on its own, when I was running and errand and had driven several miles, in a 35- and then 45-mph zone (so figure I did 50+). No indicator as to why it cleared then. Unexpected behavior unless I don't understand how this is supposed to work.

 

[EdP]

Odd scenario (and full disclosure, did not consult the manual) - got a low tire pressure alert, first one ever, said the driver-side tires were at 29 and 30psi. I tested them all and filled them up to 35-36 per spec. Oddly, the car recognized the new values, but would not automatically clear the alarm. I rebooted the head-end, no change. I drove around the block (figureatively) and got it above 45 mph (there was a speed threshold in my old G35), no change. It _finally_ cleared on its own, when I was running and errand and had driven several miles, in a 35- and then 45-mph zone (so figure I did 50+). No indicator as to why it cleared then. Unexpected behavior unless I don't understand how this is supposed to work.
View attachment 62724

Probably would have cleared right away at 46 or 37. This is quite normal and I've seen it on a few cars. I always go a bit high and it clears in a short drive.

These are not precision instruments design for NASA moot shots.

 

[David-R]

Sometimes it just takes a while.

 

[gknyce]

I did chk the mobile app, after the alarm did not clear - and it reported as tire pressure all normal. I did _not_ check it before add air so no idea if it ever mirrored the alarm, or not.

 

[Sampras]

I generally overfill up to about 40 or higher because I find the warning light will shut off more quickly. Then I remove some air to get back to my desired pressure.

 

[Tones_G70]

Always fill over 1psi or 2 psi recommended psi.
Then you must drive the vehicle for about 10 minutes in different speeds for it to fully read. Sometimes longer in cooler temps.

 

[EdP]

Always fill over 1psi or 2 psi recommended psi.
Then you must drive the vehicle for about 10 minutes in different speeds for it to fully read. Sometimes longer in cooler temps.

I always fill about 2 over even if the warning did not go off. It is not very noticeable and will go down to "recommended" over time and is that much longer before I have to add again.