Hi everyone, I recently replaced the old Dunlops with a new set of Pirelli Cinturato P7 AS Plus II, but the low pressure light keeps turning on.

I've confirmed all four tires are set to 32 PSI when cold, and I've reset the light several times, but it eventually turns back on. It seems to be random, sometimes it turns on after a few miles, other times I can go for much longer until it turns back on.

I read an old thread from 2008 about a potential tech issue with our tire pressure systems, but couldn't find more details about it. I don't think we have TPMS sensors, so it's not a battery thing.

I plugged in my code reader also, nothing. Could it be something with the valves or stems? Has anyone ran into the same issue? Side note, the Pirellis are nice and quiet, not sure if it's because they're great tires, or my old Dunlops were trash. Thanks for any help.

 

I know you said you have cleared the light and verified the pressure. But did you do an initialize after getting the tires replaced? Our system works with the ABS and the rotation of the tires.

 

02Legend, you are amazing. I'm going to pick up my kids now, and will try that and report back soon.

 

Update: After driving around yesterday and this morning, the low pressure tire light no longer turns back on.

02Legend was correct on the advice, thanks again!

 

Great to hear it, and glad I was able to help out.

 

OK, how do you do an "initialize"..........

 

No worries, check out page 97 of the owners manual.

 

But, where is that reset button??

 

Gotcha. Check out this thread. There's a good picture of it, but it's under the steering wheel. You might even be able to reach it while just sitting in the driver's seat.

https://www.clublexus.com/forums/ls-...h-picture.html

 

That picture is for an LS430. Is it the same for the SC430?