Get an air pump that runs off your car battery. Don't get a jump/pump as those are more expensive and they break. Get one with a flashlight.
It's one of those cheap purchases that makes a world of difference.
this post was submitted on 15 Oct 2025
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Happy tireween to you too.
nice to have a low pressure holiday.
I live in Taiwan and it's been 90-95 since February.
Witch's cauldron on top of a rack. How appropriate for Spooktober!
I was genuinely wondering, if that's the joke, having never seen this light before...
This is the warning for low tyre pressure. Often shows up after you've had a tyre change, such as when you go to winter tyres around this time of year.
Colder air also takes up less volume relative to warmer air, therefore exerting less outward pressure. So, if you haven't aired up since July, it's entirely possible that the lower temperatures alone can cause this light to come on.
Interesting fact, the tyre pressure warning isn't always measuring your tyre pressure! At least, not directly.
Some cars have actual pressure sensors inside the wheels which do measure it, while others (like mine) use the ABS sensor - which measures wheel rotations - to determine pressure as a byproduct.
The theory goes that an under-inflated tyre is smaller in diameter than properly inflated one, and so will have to make more revolutions than a properly inflated one to cover a given distance. By comparing the current status against a programmed normal, a mismatch that indicates possible low pressure can be detected.
Because what is 'normal' can change after you inflate your tyres or change them, cars with this type of indirect sensor will also have a button somewhere to reset it (mine is inside the glove box) so you can redefine what 'normal' is and cancel any spurious warning.
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Do you mean the time of year where a battery cell goes bad, ruining both the battery and the alternator while you have an Uber passenger in the car an hour from home and every system in your car is cartoonishly shutting off one by one?
Because YEP I GUESS IT'S ABOUT THAT TIME. :(
Chances are that the alternator was already bad, but symptoms didn’t manifest until the battery started to die. A running car should be able to stay alive purely from the alternator. It’s not a great long term solution, since it causes extra wear on the alternator. But it is possible to just push-start it and then keep it alive with the alternator alone.
But it is possible to just push-start it and then keep it alive with the alternator alone.
can confirm. had a buddy in HS whose car had neither a starter nor a working battery. every day after everyone left the parking lot, he would have us push his car over to the street on top of a hill, and then he'd clutch start it on the way down. we only had to push it back up the hill a couple times when he was learning how to do it.
we top ours up at tireween and tirester every year
fall? yeah, the front will fall off soon
Yeah, that’s not very typical. I’d like to make that point.
remember to tow your car outside the environment if it needs work
Is that the symbol for a cauldron? I don't get it
I don't own any horse shoes.
Its a low tire pressure light.
In the fall, lower temperatures cause tire pressure to drop.
Isn't it great how cars just have like random lights that come on whose design is so ambiguous that there's no possible chance you could work out what they're trying to indicate.
My car occasionally displays a blue tick, what the hell is that supposed to mean? It only comes up maybe once every 4 or 5 months so it's really hard to work out a pattern.
My car occasionally displays a blue tick, what the hell is that supposed to mean? It only comes up maybe once every 4 or 5 months so it's really hard to work out a pattern.
I got the same issue with my BMW, except it's a green arrow pointing either left or right that flashes and makes a ticking sound. Only lasts for a few seconds though.
Oh that sounds like the swerve suddenly into another lane without looking light.
4-5 month is an awfully long time to be too lazy to rtfm
I mean, I agree it's silly design, but come on
Ten seconds to search. It's either low engine temp (don't rev high), or he's driving with high beams on.
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I just got a used Cadillac and it has this little blue icon quite frequently. Had to get out the manual. It means I'm driving over the speed limit. Fuck's sake what a useless light.
I used to drive a Sprinter, and on the dashboard was a light with iconography of waves, wind, and raindrops. I concluded that it was warning me of a storm at sea.
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It never really occurred to me that most people don't check their tire pressure once or twice a month and let it get that bad.
"That bad" is dropping from 32psi to 28 on the first cold day of the year. Doesn't matter, I fill up once I'm back home.
I check mine when my car tells me to
I used to be somebody who checked tire pressures much more often. Oil level too.
But even though our current vehicles are 12 and 13 years old, the tire pressure monitoring works right away on a cold day, and its threshold before turning on the light isn't super low. It's high 20s psi I believe.
It's not that I want to ignore the workings of my car. I often enjoy using my phone olconnected to my bluetooth OBDII scanner to provide a bunch of extra gauges. I drive an old Mazda3 and it doesn't even have a temperature gauge, just a light. So it's cool being able to monitor coolant temperature, voltage, actual gallons of fuel in the tank, and various other sensors if I feel like it.
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Is it normal for tire emergency lights to come on in autumn?
Just the low tire pressure warning.
Cold temperatures reduce the pressure, and since air leaks out of tires naturally over time, it is quite common for the change in temperature to suddenly put your tires below the threshold for normal tire pressure.
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We usually get a big enough quick drop in temperatures that I get this each autumn. Even with new tires
Yes, if the tires were close to the cut off before the temp dropped. The sensor in my vehicle readstire pressure about 10% low in colder weather, which can be enough to trigger the warning on chilly mornings if I haven't topped it off during the summer.
Heat up gas => pressure go up
Cool down gas => pressure go down
pV=nRT
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I just checked my tires, somehow only lost 0-1 psi per tire since April. I did check them on a hot day so that probably helped.
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