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Low pressure light keeps returning

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Old Jun 15, 2021 | 09:47 AM
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Default Low pressure light keeps returning

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.

Last edited by Marston; Jun 15, 2021 at 09:48 AM. Reason: Added more stuff
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Old Jun 15, 2021 | 03:16 PM
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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.
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Old Jun 15, 2021 | 03:25 PM
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Originally Posted by 02Legend
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.
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Old Jun 16, 2021 | 06:51 AM
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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!
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Old Jun 16, 2021 | 05:03 PM
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Originally Posted by Marston
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.
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Old Jun 17, 2021 | 01:43 PM
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OK, how do you do an "initialize"..........
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Old Jun 17, 2021 | 01:52 PM
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No worries, check out page 97 of the owners manual.



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Old Jun 17, 2021 | 01:56 PM
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But, where is that reset button??
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Old Jun 17, 2021 | 01:58 PM
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Originally Posted by jimisbell
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
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Old Jun 17, 2021 | 02:16 PM
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That picture is for an LS430. Is it the same for the SC430?
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