What are low pressure tire sensors set to?
#1
Pole Position
Thread Starter
What are low pressure tire sensors set to?
Anyone know what pressure level triggers the low tire pressure alert? I have a 2009 IS 250 AWD, 17" all around. Alert just came on, tires all seem to be about 32 psi, one closer to 30. Had the car for 4 years never had this happen before. Thanks.
#3
Lead Lap
iTrader: (1)
If you've physically checked all five tires, including spare and they're as you say, you may have a low sensor battery. They usually last more than four years though. As mentioned, there's a reset button under the dash near the steering column. It's more likely you just need to do a reset after you've inflated all tires to your desired pressure.
#4
Pole Position
Thread Starter
Ok thanks. I was trying to figure it out if there is actually a problem with the one tire, or if they are all just a little low, or if its the sensor. I think i'll inflate them all and monitor. Thanks
#5
Lead Lap
iTrader: (1)
Not sure what the actual low pressure trigger is, but it's at least 5 psi below the setting on tpms.
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#10
Super Moderator
If you've physically checked all five tires, including spare and they're as you say, you may have a low sensor battery. They usually last more than four years though. As mentioned, there's a reset button under the dash near the steering column. It's more likely you just need to do a reset after you've inflated all tires to your desired pressure.
The spare does not have a sensor in it.
#11
Pole Position
Thread Starter
Thanks I figured the doughnut didn't have a sensor. The alert went away as the day warmed up but came back the next morning. Think its just the temp drop. Got new tires in june. I put a couple lbs in each one and been good to go. Just weird this never happened before. Always worried it could be some other issue. Thanks again.
#12
TPMS sensor are set to trigger when tire pressure falls 25% below the tire pressure printed on the tire placard (usually found in drivers door jamb)
AGENCY:� National Highway Traffic Safety Administration (NHTSA), DOT.
ACTION:� Final rule.
SUMMARY:� This final rule establishes a new Federal motor vehicle safety standard (FMVSS) requiring installation of a tire pressure monitoring system (TPMS) capable of detecting when one or more of a vehicle�s tires is significantly under-inflated. This final rule responds to a mandate in the Transportation Recall Enhancement, Accountability, and Documentation (TREAD) Act. This final rule requires installation in all new light vehicles of a TPMS capable of detecting when one or more of the vehicle�s tires, up to all four tires, is 25 percent or more below the manufacturer�s recommended inflation pressure (placard pressure) or a minimum activation pressure specified in the standard, whichever is higher.
http://www.nhtsa.gov/cars/rules/ruli...nalrule.6.html
.
AGENCY:� National Highway Traffic Safety Administration (NHTSA), DOT.
ACTION:� Final rule.
SUMMARY:� This final rule establishes a new Federal motor vehicle safety standard (FMVSS) requiring installation of a tire pressure monitoring system (TPMS) capable of detecting when one or more of a vehicle�s tires is significantly under-inflated. This final rule responds to a mandate in the Transportation Recall Enhancement, Accountability, and Documentation (TREAD) Act. This final rule requires installation in all new light vehicles of a TPMS capable of detecting when one or more of the vehicle�s tires, up to all four tires, is 25 percent or more below the manufacturer�s recommended inflation pressure (placard pressure) or a minimum activation pressure specified in the standard, whichever is higher.
http://www.nhtsa.gov/cars/rules/ruli...nalrule.6.html
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