Spray some soapy water to the valve and see if any bubble comes out. You can also spray to tire bead to check air leakage from there.
Anyways I have a plan for a long journey this weekend, if it happens I will check the air pressure before refilling the air in one of the fuel stations where I regularly fill fuel
Before I ventured out, I rechecked the air pressure at my regular fuel station and all tires were looking fine so I went ahead with my weekend trip to my native.
Yes, I am also hoping that issue is solved, will check and update here
As per my understanding the issue was due to low Air pressure set to front left Tire by the Tire shop folks when I bought new tires.
A big lesson learnt, even a low air pressure can lead to Steering wobbling / Vibrations and we have to keep on eye on the folks who put the air to make sure its done correctly and also as a good habit , we need to re-fill the air when ever we going out for a long journey or highway out of the city limits.
Also as a precautionary measure I will check with FORD Service folks on the Disc pad and Rotor correctness during my next visit.
Srikanth - Once again thanks a lot for all your help, I really appreciate it