Tire sensor question regarding pressure changes
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,835
Likes: 295
From: Phoenix AZ
Tire sensor question regarding pressure changes
I live in Phoenix and have noticed that my tire pressure will change from 28 psi cold, to as high as 35 psi when I am driving on the freeway.
This is a significant change in pressure. Why don’t my tire sensors go off indicating such a pressure increase and/or drop? I thought they were supposed to alert to any significant changes in pressure.
This is a significant change in pressure. Why don’t my tire sensors go off indicating such a pressure increase and/or drop? I thought they were supposed to alert to any significant changes in pressure.
Instructor
Joined: Oct 2005
Posts: 247
Likes: 3
From: Northern NJ
St. Jude Donor '06
Originally Posted by Rob4092xx
I live in Phoenix and have noticed that my tire pressure will change from 28 psi cold, to as high as 35 psi when I am driving on the freeway.
This is a significant change in pressure. Why don’t my tire sensors go off indicating such a pressure increase and/or drop? I thought they were supposed to alert to any significant changes in pressure.
This is a significant change in pressure. Why don’t my tire sensors go off indicating such a pressure increase and/or drop? I thought they were supposed to alert to any significant changes in pressure.
It is normal for tire pressure to increase as the tires heat during usage.
Page 5-67 in the Onwers Manual:
The TPMS also uses the DIC to warn the driver when air
pressure, in one or more of the tires, falls below 24 psi
(164 kPa) or is above 42 psi (290 kPa).
Pro
Joined: Nov 2004
Posts: 608
Likes: 1
From: Oregon
The TPM doesn't care what the difference between cold and hot pressures are. The threshold for warnings are:
High pressure warning = anything above 42PSI
Low tire pressure warning = anything in 5-25 PSI range.
Flat tire warning = anyting below 5 PSI.
The recommended cold pressure is just that, the cold pressure. As you drive the car seeing an increase in pressure is normal. 7 PSI over cold is nothing to worry about. GM and GoodYear feel the tires are fine until you exceed 42 PSI. That is why the TPM issues a high pressure warning above 42 PSI.
High pressure warning = anything above 42PSI
Low tire pressure warning = anything in 5-25 PSI range.
Flat tire warning = anyting below 5 PSI.
The recommended cold pressure is just that, the cold pressure. As you drive the car seeing an increase in pressure is normal. 7 PSI over cold is nothing to worry about. GM and GoodYear feel the tires are fine until you exceed 42 PSI. That is why the TPM issues a high pressure warning above 42 PSI.
Former Vendor
Joined: Aug 2005
Posts: 5,774
Likes: 0
From: Loganville GA
Originally Posted by jmess
The TPM doesn't care what the difference between cold and hot pressures are. The threshold for warnings are:
High pressure warning = anything above 42PSI
Low tire pressure warning = anything in 5-25 PSI range.
Flat tire warning = anyting below 5 PSI.
The recommended cold pressure is just that, the cold pressure. As you drive the car seeing an increase in pressure is normal. 7 PSI over cold is nothing to worry about. GM and GoodYear feel the tires are fine until you exceed 42 PSI. That is why the TPM issues a high pressure warning above 42 PSI.
High pressure warning = anything above 42PSI
Low tire pressure warning = anything in 5-25 PSI range.
Flat tire warning = anyting below 5 PSI.
The recommended cold pressure is just that, the cold pressure. As you drive the car seeing an increase in pressure is normal. 7 PSI over cold is nothing to worry about. GM and GoodYear feel the tires are fine until you exceed 42 PSI. That is why the TPM issues a high pressure warning above 42 PSI.
