Diesel glow plug flashing and emmisons light on
 

My A3 1.6tdi 2013 has just been mot'd Friday and Sunday the diesel glow plug light started flashing and it went into limp home mode and then the emmisons management light has come on....got new discs and pads done and also new tyres in mot...is it possible they've knocked off a sensor. Also my audi is waiting on the flow transmitter being changed and a software update as part of the recall....would that be the reason maybe. Any thoughts would be appreciated