Ask Honest John

Most recently answered tpms questions
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...
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?
The tyre pressure warning light has come on three times and been reset. I’ve only had the car five days. What is going on? Pressures checked by engineers and they are all ok. It also does not have a...
I have a Toyota Yaris Cross and recently the in-car tyre pressure readout keeps showing a number of tyres as being below the required pressure. However, after driving the car for a while, the tyre pressure...
Will my 2008-registered Hyundai i30 fail an MoT if it has a warning light indicating low tyre pressure even when tyres are correctly inflated, or a warning indicating a fault with the TPMS system? I have...
Does he new BMW Active Tourer M Sport has tyre pressure monitoring fitted as standard?
How sensitive are tyre pressure monitors? My wife’s Skoda Fabia’s tyre pressure warning came on recently and when I checked the pressures they were all a long way out. Is a slight pressure decrease over...
There is a fault with my tyre pressure sensor. The tyre pressures are correct but the warning light keeps coming on. Would this fault invalidate the MOT?
Can you tell me if a faulty tyre pressure monitoring system (TPMS) is an MoT failure point?
Do you have an opinion on tire pressure monitoring kits? If so, do you recommend any particular make?