Low Tire Pressure Warning

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LG_123

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Hi all, I’ve got a 2019 expedition with a really handy feature that shows the tire pressure in each tire.

Unfortunately, it appears to be off by 8-10 psi and is giving me a low pressure warning (31psi or lower) while the gas station pump is telling me all the tires are up at 40psi.

Has anyone else had this issue? Is the stock pressure monitor just really bad and can it’s warnings be turned off?
 

99WhiteC5Coupe

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Hi all, I’ve got a 2019 expedition with a really handy feature that shows the tire pressure in each tire.

Unfortunately, it appears to be off by 8-10 psi and is giving me a low pressure warning (31psi or lower) while the gas station pump is telling me all the tires are up at 40psi.

Has anyone else had this issue? Is the stock pressure monitor just really bad and can it’s warnings be turned off?


A suggestion - I would check the tire pressures with a good, high-quality hand-held tire gauge before assuming the gas station pump is correct.
 
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LG_123

LG_123

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A suggestion - I would check the tire pressures with a good, high-quality hand-held tire gauge before assuming the gas station pump is correct.

Very good point. Do you have a brand you like? Something I could put in my glove box would be handy.
 

99WhiteC5Coupe

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Very good point. Do you have a brand you like? Something I could put in my glove box would be handy.

I have a professional series brass hand-held Accu-Gauge air pressure gauge, which has a lifetime guarantee. It is designed to lock on the pressure when you use it, so you can see exactly what the pressure is. You then simply push a button to release the needle (back to zero). I have returned it once for free repair, when the needle stopped locking at the high pressure point. It comes in a small pack and I keep in in my Expedition.

I have found over the years that many public / gas station gauges are often dropped, left on the ground in inclement weather, stepped on, etc. I will use them occasionally to add air, but always use my own gauge - and usually my own air pressure pump at home.

You’re in Toronto - cold weather now. I’m in the USA / Midwest with temperatures in the 20’s F at night. I recently added air to the tires of all my family vehicles, due to the recent major drop in temperature.
 

jeff kushner

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Agreed, a known-quantity pressure gauge, the one in your glove compartment is usually good for reference even if it's a crappy one. You know where it should be on your own gauge regardless of what the pump reads.

A couple of weeks ago, I had one of the sensors go into alarm on a cool night.....just topped off the tires and it went away within a 1/2 mile of driving.

jeff
 
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LG_123

LG_123

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I went out and bought an AstroAI portable air compressor to keep in the truck. It’ll also be useful for our airstream wheels.
Turns out the electronic gauge on the dash was dead on and the gas station I tested at was off by about 30%.
 
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