Having Tyre pressure monitors fitted to your vehicle is unbeknown to me a part of the MOT test and will be subject to an "advisory" warning if not working correctly if vehicle is pre 2012 and an immediate failure if from post 2012
TPMS and the MOT Test
TPMS is now being tested as part of the MoT road worthiness test. At present, any vehicle manufactured before 2012 that has been fitted with a TPMS will receive an ‘advisory’ on their test if a fault is detected or the TPMS dashboard light is illuminated. This will be recorded on the MoT test certificate. However, as of 2012, MoT legislation underwent review and an illuminated TPMS warning light will now result in an immediate MoT failure
I did not know that did you ???????????
by 
Subject: Tyre pressure monitors 
