So this morning on they way to work the Spare Low Pressure light comes on. It cold here in Chicago so I have had to add air to the front right in the last month but how am i going to get air in the spare?
This is perfectly normal. You're just not accustom to having TPMS. If you have friends/family or other vehicles, this will hold true as well. For every possibly 8-12 degree drop in temperature, air compresses in, thus your PSI drops as well. A good practice is to add about 2-3 PSI more per tire, when the tires are cold, and your not freezing your butt off too much outside, during the day. This way, when the weather gets colder overnight, the 2-3 PSI you added will eventually level to the manufacturer's setting (generally 35 PSI, which is what my XK requires). As it gets warmer via by season, then you'd just have to leak a few PSI out. In regards to the spare, the tire does not do any pressure changes, so with temperature changes, it'll also go down and down.Haags said:This drives me nuts. I have had my 06 for two years, and I have to add air to the tires every time the temperature drops, then usually another 1-2 times during the winter months. I assume this is normal, but I've never had a car with pressure sensors so I have no point of reference. The warnings come on when the pressure gets to around 30-31 psi and I have to add to get it up to 35. I've had to do the spare 4 times in two years, which seems excessive and is a real pain in the *** because of the location of the stem on top of the spare.
Your best bet is to call around and do some google search for 'nitrogen tires xxxx' and the city you live in. This differs city to city, state to state. I've hung around a ton of car enthusiasts who've mentioned about it to me. It's not that important to me. It'll cost you I believe $50 to $100. Give that a shot, and good luck!jeep cmder said:Just wondering where you get nitrogen?
I've got the same problem and it's a pain in the rear. I have to take all my gear out of the jack compartment, drop the tire, pump it back up and then reverse the process. I like the idea of low air pressure warnings, but hate to screw around with the spare.
If the spare could be pulled up under the vehicle with the other side down, it would certainly be a lot easier to put air in the tire. I think I looked at that possiblility the last time I dropped the tire and determined that the tire would not stow correctly if it were upside down.
Costco will only fill your tires with nitrogen if you buy the tires from them.Andre said:Costco also offers nitrogen. If you buy tires from them they will check your tire pressure and rotate free for life of tires. (I don't work for them, I like to go for a cheap lunch.)