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Old 02-10-2016, 12:46 PM
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Tire Pressure warning on dash but it's okay??

2 days now this thing is telling me the left front is low and needs to be inflated to 33psi. Every tire is the same because it's 42 degrees out. WTF is this things problem.


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Old 02-10-2016, 01:12 PM
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Re: Tire Pressure warning on dash but it's okay??

It is saying that you have (at least one) low tire. Is that not true?

Once a tire falls below the low-pressure limit, it has to be inflated to above the minimum recommended pressure (33psi in this case) to turn the warning off. The other tires probably didn't quite dip below the low-pressure limit (yet).
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Old 02-10-2016, 01:18 PM
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Re: Tire Pressure warning on dash but it's okay??

Quote:
Originally Posted by tomk View Post
It is saying that you have (at least one) low tire. Is that not true?

Once a tire falls below the low-pressure limit, it has to be inflated to above the minimum recommended pressure (33psi in this case) to turn the warning off. The other tires probably didn't quite dip below the low-pressure limit (yet).
It came on at 29psi but they were all 29 this morning. When I got rolling they were 30. When it hits 80 degrees it will be up around 33 again.

Can I just put it at 34 and it will go away by the time I drive an hour to work then even it out?
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Old 02-10-2016, 01:24 PM
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Re: Tire Pressure warning on dash but it's okay??

Quote:
Originally Posted by tomk View Post
It is saying that you have (at least one) low tire. Is that not true?

Once a tire falls below the low-pressure limit, it has to be inflated to above the minimum recommended pressure (33psi in this case) to turn the warning off. The other tires probably didn't quite dip below the low-pressure limit (yet).
Exactly.

For example, if the low pressure limit threshold is 30, the left front may be giving you the warning because it's probably registering at 30.0 and the other three might be between 30.1 - 30.9. In this case, they would all still show at 30 in the instrument cluster.
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Old 02-10-2016, 01:27 PM
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Re: Tire Pressure warning on dash but it's okay??

Quote:
Originally Posted by imp0ster View Post
2 days now this thing is telling me the left front is low and needs to be inflated to 33psi. Every tire is the same because it's 42 degrees out. WTF is this things problem.
Pick up a good gauge and make sure that the readings are correct and agree within a pound or so of what you get in the EVIC.

Presuming they do match, one could argue that probably the display could turn all of the tires red instead of just the one, since all of them have the same reading.

I've found the Michelin MN-4535B Digital Programmable Tire Gauge with Bleed Valve to agree with the EVIC, but YMMV.

How hot was it when you last inflated your tires?
To what pressure?
How long ago?


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Old 02-10-2016, 01:29 PM
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Re: Tire Pressure warning on dash but it's okay??

Quote:
Originally Posted by lstowell View Post
Pick up a good gauge and make sure that the readings are correct and agree within a pound or so of what you get in the EVIC.

Presuming they do match, one could argue that probably the display could turn all of the tires red instead of just the one, since all of them have the same reading.

I've found the Michelin MN-4535B Digital Programmable Tire Gauge with Bleed Valve to agree with the EVIC, but YMMV.

How hot was it when you last inflated your tires?
To what pressure?
How long ago?



3 weeks ago 33psi about 75 degrees out.
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Old 02-10-2016, 01:36 PM
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Re: Tire Pressure warning on dash but it's okay??

Quote:
Originally Posted by imp0ster View Post
3 weeks ago 33psi about 75 degrees out.
Ah, then your display is likely accurate and you may wish to add a bit of air.
If it gets even colder than 42 in your area, perhaps a bit more air.

33 is a tad low for my tastes, yours may vary, but you can either ignore the warnings or add air--since the pressure in your tires is a function of their temperature.

Presumably a bit of highway driving will bring the pressure up....
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Old 02-10-2016, 01:45 PM
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Re: Tire Pressure warning on dash but it's okay??

Quote:
Originally Posted by lstowell View Post
Ah, then your display is likely accurate and you may wish to add a bit of air.
If it gets even colder than 42 in your area, perhaps a bit more air.

33 is a tad low for my tastes, yours may vary, but you can either ignore the warnings or add air--since the pressure in your tires is a function of their temperature.

Presumably a bit of highway driving will bring the pressure up....
I like 33 for ride comfort and when I tow the boat. I just want the stupid exclamation gone so I'll inflate em to 33 and watch the pressure when it warms up
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Old 02-10-2016, 02:00 PM
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Re: Tire Pressure warning on dash but it's okay??

Hi there,
Same happened to me some time ago...my guess was that one was 32.9, the other 33, the other 33.1, etc, one was giving me the warning while the others seem fine...my solution ?..I went with 34 on all of them, its really not that much and since then I've never had that alert again.
By the way..after I inflate it takes some minutes before the actual reading comes on, its not inmediate, at least in my case, give it a few minutes or miles.
Rgds.
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Old 02-17-2016, 02:51 PM
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Re: Tire Pressure warning on dash but it's okay??

If you want the reading to go away you are going to have to inflate them all to the recommended pressure. I had this happen about a month ago when my tires went below threshold b/c of sub zero temps.
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Old 02-17-2016, 06:32 PM
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Re: Tire Pressure warning on dash but it's okay??

you can inflate 'em, drive to the local bar and have a couple diet cokes, drive home, and air down if you want.

attached is the magic pressure chart for '14s (dunno if other years are different). AFAICT the system doesn't really care about the pressure NOW, it cares about crossing the low pressure threshold.. and once a sensor has checked in what a pressure below the low pressure threshold, you are in the red zone until you re-inflate to placard pressure..
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Old 02-18-2016, 10:11 AM
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Re: Tire Pressure warning on dash but it's okay??

Inflate them all to 34-35psi. Keeping them at 32-33 will likely have you under 30 when the temp is below 40F..until they warm up a bit.

IMHO tire pressures 35 +/- 3-4 psi do not make any significant difference in mileage or ride. There are many other variables which have more of an impact on these things like (speed, road conditions, tire design, etc.). Real life is not controlled conditions..
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