Quote Originally Posted by Peter View Post
Tyre sensors. Most pointless thing I have ever experienced. I am no genius with cars but I am capable of spotting a flat tyre on my own!
There was a 'do not drive' red warning that intermittently came on. Mazda dealer could not find the reason.

A £10 OBD2 plug-in from Amazon found it

Exhaust pressure sensor. Who knew you needed such a thing..?