My girlfriend has a 05 scion tc limited edition. It has the 18 inch black tires/rims. She is always having problems with her tire light coming on. The dealership is full of BS and never fixes the problem. Her psi is always 40 or above, but never all the same... Anyways, I just looked in her driver side door and it says the front tires should be 32, and the rear should be 29... So I just check and two of the tires were at 60 and the other two at 50-55.... I fixed it to what the door said... is that too low of a psi to have...32 and 29.. I'm alittle worried. She said it's feels great... I'm worried???? Thanks!
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Re: 2005 Scion Tc - Tire Pressure
It should be what the door says... but make sure the door is showing the size of tires that are on the vehicle... tire pressures are usually determined by an engineer for that vehicle and tire size
Also what does the sideway of the tire say ?
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It sounds like the tire pressure monitor warning light. Does the light look like this? Check and adjust the pressure in all the tires (most Toyotas even monitor the spare tire pressure so check that also). If you find one tire with significantly lower air pressure then the rest bring the car to a repair shop to have them find and repair the leak. Once the air in the tires are correct the light will go off.
You shouldn't be setting the tire pressure to the max inflation pressure listed on the sidewall, that will likely result in uneven tire wear with the center of the tire wearing out prematurely. You should set the pressures according to the listings in the door jam. Most likely 32-34psi. Also, have you checked the spare tire? Some systems monitor and will illuminate the TPMS light if the spare tire pressure isn't within an acceptable range. The spare is often overlooked when checking tire pressures because of a TPMS indicator.
Your tire size is marked on the sidewall of your tire, it will read something like this, P205/70R15. There may be other numbers or letters but these are the critical ones that the tire shop needs to fit new tires on your car.
You car is set up to run on a specific size tire but changes can be made, for any number of reasons, without too many problems as long as you know what to expect. Changing the P205 number will change tour speedometer about 2 mph per size. Going from P205 to P195 will slow the car down and going up to P215 will speed it up the same. The speedometer will read the same but the car will be moving at the new rate of speed.
Changing the middle number, 70 will make your tire wider or narrower and the numbers work backwards. A 60 tire is wider than a 70 tire. This can affect your gas mileage but one number won't be especially noticeable. If you are buying snow tires for winter then 75 is the best number for that. The tire is thin and cuts through snow to make contact with the road.
Changing the last number 15 requires you to change the rims. That number is the diameter of the rim and there really isn't much reason to change them unless you are customizing your car.
Price comes into play more than brand name. You don't need that $250 super sticky tire for normal every day driving which you can do just as well on a plain jane $125 tire.The sticky tires use softer rubber and wear out quicker.
Finally, do not believe anyone who tells you that all season tires are suitable for snow and ice. They work better than summer tires if you get caught in a freak storm, but they aren't suitable for everyday winter driving. If you live in an area where there is a considerable amount of ice on the roads throughout the winter you should seriously consider getting you tires studded for improved stability, handling and stopping. Hope this helps.
the light means that there is still a problem with the tire system, if there is a spare make sure to check that. If the light is still on after setting all tire pressures then there is most likely one of your tire pressure sensors bad which is the valve stem if equipped. What you can try is pump all tire pressures up to about 45 psi, then qiuckly let the air out one tire at a time. This kinda wakes up the system. If this doesn't solve it then you will have to take it to the dealer.
Took back to store where bought tires and rims. They also put the computer on, but they drove with it attached and the tech who was in passenger seat said left front wheel not calibrated as the others so he calibrated all wheels to .05 at the maximum tire allowance. This has stopped the brakes from grabbing.
Said that the factory had programmed in for 16 inch rims. Jeep came standard with 18 inch.
Now everything working great. Don't know why dealership could not do this properly. Happy I bought tires and rims from a reputable and knowlegeable store. (Tire Craft) Thanks Mike.