So the TPMS warning came on in my recently acquired used 10 Fusion hybrid 3-4 weeks ago, so I immediately went to costco and top everything off to 33psi (labeled on the door), but apparently not the cold psi (since I drove for about 5-6 miles). I noticed that the LF tire was in need of a few pumps to beep (costo's automatic system beeps once you reach the psi), all three others almost beeped instantly after the air hose was on.
It went on again last night, so I took it to Goodyear, where the previous owner bought the tires new from (3 yrs, less than 40k miles). He also had a repair receipt a year ago showing "slow leak" but for RF tire at Goodyear as well. Wasted about 3 hrs, and was told they found nothing in LF tire, but RF has a hole too close to the side to patch and wanted me to change a new tire at the location. I declined thinking I needed more info on the purchase, plus the goodyear dude off the line told me that it should be pluggable but they (or other corporate stores like costco, mr.tire etc) policy wouldn't allow that.
I took off, but noticed that this time the tpms warning was still on, so I drove to a garage down the road and checked the tire pressure on four tires, surprising, the LF has only 25ish psi, while all others are around 30-33psi. So I top the tires off to about 35 psi and again the warning went off. I drove back to the store and demanded explanation, but they insisted the illogical answer that the leak was on RF since they saw bubble on it, but nothing on the LF. I asked if they checked the rim, wheel, seal, and they insisted that they did all they could do.
I'm greatly puzzled here:
1. First of all, where are the 10 Fusion's tpms sensor? When filling air at the garage, the tech went out with me and told me that all my tires do not have the sensor, since there were no metal attachment on the stem. But apparently the car is sensing the psi..
2. What could be the possible reason for the loss of pressure in my LF tire. I don't want to be scammed to buy a new RF tire, while the real problem was the left. I don't know if they checked all tires, sounds like they did not submerge the tire in water (after remove it from the rim), but just soapy water tested them, and apparently did not top off the air.
3. Where can I get it plugged if indeed the RF has a hole as they claimed? Or should I get 2nd opinion on that based on their shady work today.
Thanks a lot.