Car is a 2008 Suburu Legacy with TPMS.
I'm trying to help my aunt out - I told her I would swap her winter tires off for her so she didn't need to go back to the shop.
So I pick the car up this morning, with her 4 all seasons in the back, bring it to my house, get all 4 tires out, and notice one is clearly flat. Okay - start checking the other 4 and 3 of the 4 are flat, look to me that the valve cores have been removed, but the 4th one is still there.
At this point I figured I would go buy a couple of valve cores and screw them in (to be honest, never replaced on before but looking it up online seemed pretty straight forward). Occurred to me that I should check if the car has TPMS (it does). Call my aunt up, ask her if she recalls buying new TPMS sensors when she got the snow tires mounted, she said she doesn't. Asked her if the light has been on all winter, says it hasn't, but there were a couple of times it came on, and she went back to the shop that mounted the tires two weeks ago, they said the problem was fixed and to come right back if it came on.
Now I'm confused, my understanding is she would be getting the light all the time if she did not have sensors in the tires. My understanding is the TPMS sensor mounts to the bottom of the valve stem. Inspected the all seasons, I can't see any place the bead has been broken to get the sensor out... and I'm still pretty confused as to why 3 of the 4 valve cores would be missing.
Any ideas, am I missing something obvious?
I'm trying to help my aunt out - I told her I would swap her winter tires off for her so she didn't need to go back to the shop.
So I pick the car up this morning, with her 4 all seasons in the back, bring it to my house, get all 4 tires out, and notice one is clearly flat. Okay - start checking the other 4 and 3 of the 4 are flat, look to me that the valve cores have been removed, but the 4th one is still there.
At this point I figured I would go buy a couple of valve cores and screw them in (to be honest, never replaced on before but looking it up online seemed pretty straight forward). Occurred to me that I should check if the car has TPMS (it does). Call my aunt up, ask her if she recalls buying new TPMS sensors when she got the snow tires mounted, she said she doesn't. Asked her if the light has been on all winter, says it hasn't, but there were a couple of times it came on, and she went back to the shop that mounted the tires two weeks ago, they said the problem was fixed and to come right back if it came on.
Now I'm confused, my understanding is she would be getting the light all the time if she did not have sensors in the tires. My understanding is the TPMS sensor mounts to the bottom of the valve stem. Inspected the all seasons, I can't see any place the bead has been broken to get the sensor out... and I'm still pretty confused as to why 3 of the 4 valve cores would be missing.
Any ideas, am I missing something obvious?
