TPMS questions
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Veteran
Joined: Nov 2013
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From: Timmins, Ontario, Canada
TPMS questions
OK, i'm trying to figure out a few things.
What are the levels that our TPMS gives warnings. I currently have a low tire and would like to know. I'm just curious.
First, yes, i know that in the cold the tire pressure goes down and that could cause a warning light. All 4 tires currently read 32 to 34 if i remember correclty from last night in the dark. and it's currently -27 C (-16 F) so i know that it's normal. I don't really want to go put air in there while it's this cold so that it's not too high when it gets hot.
Last summer, when i was rolling down the highway during a heatwave with no cloud cover and about 1000 pounds of payload, i got a tire warning light on my dash, it didn't give me a warning message, just the tire light. I pulled over once safe (bad highway, no shoulder, truck still felt fine). When i checked by 4 tires, they were all around 42 to 45. And yes, i understand that air expands when it's hot. So, do we have a high pressure light warning, and if so, at what pressure does it come on. I'm not worried about my tires, the max pressure in the AT/2's is 85 or so.
And do any of you put Nitrogen in your tires? i did on my caliber and when i put on my AT/2's i put it also here, but i'm wondering if since i'm seeing such a wild fluctuating pressure if it's there or not. On my caliber, i noticed an MPG increase on the highway. not sure what else i did to see that increase. In the Dak, it did nothing other then make my wallet lighter, then again, the AT/2's are larger and heavier then the Goodyears that came from the factory, so i was expecting some loss.
What are the levels that our TPMS gives warnings. I currently have a low tire and would like to know. I'm just curious.
First, yes, i know that in the cold the tire pressure goes down and that could cause a warning light. All 4 tires currently read 32 to 34 if i remember correclty from last night in the dark. and it's currently -27 C (-16 F) so i know that it's normal. I don't really want to go put air in there while it's this cold so that it's not too high when it gets hot.
Last summer, when i was rolling down the highway during a heatwave with no cloud cover and about 1000 pounds of payload, i got a tire warning light on my dash, it didn't give me a warning message, just the tire light. I pulled over once safe (bad highway, no shoulder, truck still felt fine). When i checked by 4 tires, they were all around 42 to 45. And yes, i understand that air expands when it's hot. So, do we have a high pressure light warning, and if so, at what pressure does it come on. I'm not worried about my tires, the max pressure in the AT/2's is 85 or so.
And do any of you put Nitrogen in your tires? i did on my caliber and when i put on my AT/2's i put it also here, but i'm wondering if since i'm seeing such a wild fluctuating pressure if it's there or not. On my caliber, i noticed an MPG increase on the highway. not sure what else i did to see that increase. In the Dak, it did nothing other then make my wallet lighter, then again, the AT/2's are larger and heavier then the Goodyears that came from the factory, so i was expecting some loss.
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OK, i'm trying to figure out a few things.
What are the levels that our TPMS gives warnings. I currently have a low tire and would like to know. I'm just curious.
First, yes, i know that in the cold the tire pressure goes down and that could cause a warning light. All 4 tires currently read 32 to 34 if i remember correclty from last night in the dark. and it's currently -27 C (-16 F) so i know that it's normal. I don't really want to go put air in there while it's this cold so that it's not too high when it gets hot.
Last summer, when i was rolling down the highway during a heatwave with no cloud cover and about 1000 pounds of payload, i got a tire warning light on my dash, it didn't give me a warning message, just the tire light. I pulled over once safe (bad highway, no shoulder, truck still felt fine). When i checked by 4 tires, they were all around 42 to 45. And yes, i understand that air expands when it's hot. So, do we have a high pressure light warning, and if so, at what pressure does it come on. I'm not worried about my tires, the max pressure in the AT/2's is 85 or so.
And do any of you put Nitrogen in your tires? i did on my caliber and when i put on my AT/2's i put it also here, but i'm wondering if since i'm seeing such a wild fluctuating pressure if it's there or not. On my caliber, i noticed an MPG increase on the highway. not sure what else i did to see that increase. In the Dak, it did nothing other then make my wallet lighter, then again, the AT/2's are larger and heavier then the Goodyears that came from the factory, so i was expecting some loss.
What are the levels that our TPMS gives warnings. I currently have a low tire and would like to know. I'm just curious.
First, yes, i know that in the cold the tire pressure goes down and that could cause a warning light. All 4 tires currently read 32 to 34 if i remember correclty from last night in the dark. and it's currently -27 C (-16 F) so i know that it's normal. I don't really want to go put air in there while it's this cold so that it's not too high when it gets hot.
Last summer, when i was rolling down the highway during a heatwave with no cloud cover and about 1000 pounds of payload, i got a tire warning light on my dash, it didn't give me a warning message, just the tire light. I pulled over once safe (bad highway, no shoulder, truck still felt fine). When i checked by 4 tires, they were all around 42 to 45. And yes, i understand that air expands when it's hot. So, do we have a high pressure light warning, and if so, at what pressure does it come on. I'm not worried about my tires, the max pressure in the AT/2's is 85 or so.
And do any of you put Nitrogen in your tires? i did on my caliber and when i put on my AT/2's i put it also here, but i'm wondering if since i'm seeing such a wild fluctuating pressure if it's there or not. On my caliber, i noticed an MPG increase on the highway. not sure what else i did to see that increase. In the Dak, it did nothing other then make my wallet lighter, then again, the AT/2's are larger and heavier then the Goodyears that came from the factory, so i was expecting some loss.
Your Tire Pressure Monitor System (TPMS) has been optimized for the original equipment tires and wheels. Changes in the system's operation can occur when using replacement that isn't the same size, type or style.
The recommended tire pressure can be found on the sticker located on the driver door. The TPMS warning can illuminate if the reading drops below this level. The recommended pressure is specific to the factory installed tires.
Thread Starter
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Veteran
Joined: Nov 2013
Posts: 368
Likes: 12
From: Timmins, Ontario, Canada
I get that it is designed for the original wheels and tires. I still have the original wheels and my tires are not that much bigger (30.5 inch vs 29.5, 245/75R16 vs 245/70R16). My question comes to exactly what is the pressure where the TPMS warning will tell me that there is low pressure in one or more tires.
And is there a high pressure warning like what i got last summer?
I'm trying to track down to see if i have a failing sensor. I read that the TPMS warning comes on when it is 25% bellow the recommended pressure. So if the pressure is 35 (i'm not near my truck so i can't check what it says), then it would come on when the pressure reaches 26 PSI. Yet all 4 show above 30 PSI. OK, it was dark, i might not have seen the gauge correctly.
And for high pressure, if it is also a 25% difference, does that mean 43.75 PSI that it warns of a high pressure? again that is if it's 35 PSI on the sticker.
And is there a high pressure warning like what i got last summer?
I'm trying to track down to see if i have a failing sensor. I read that the TPMS warning comes on when it is 25% bellow the recommended pressure. So if the pressure is 35 (i'm not near my truck so i can't check what it says), then it would come on when the pressure reaches 26 PSI. Yet all 4 show above 30 PSI. OK, it was dark, i might not have seen the gauge correctly.
And for high pressure, if it is also a 25% difference, does that mean 43.75 PSI that it warns of a high pressure? again that is if it's 35 PSI on the sticker.