How do I find a faulty tyre sensor?

How can I find a faulty tyre sensor on my 2016 Mondeo?

My tyre deflation warning keeps coming back, what could be the problem?

After the warning has been on and adjusting the tyre pressures then resetting the computer I find that after about 20 miles the warning comes back on again. This has happened about 4 times, why?

Does it matter if one of my tyres has a different load rating?

Due to having had a puncture we now have a 95V rating tyre whereas all the remaining three original tyres are 91V. Is this illegal or dangerous? The supplying dealer says this is causing tyre pressure...

Should I have to pay to have my tyre pressure sensors reprogrammed by a dealer?

At a recent annual service for my 2017 Peugeot 3008, I requested that the front and rear wheels be swapped round so that tread wear was evened out. However, I was informed that although this was possible,...