Hi I have a seat Leon 1.8 tsi fr 2018 with 72,000 on the clock. The engine management light came on and the fault code stated it was the expansion tank sensor. A new one was fitted after a few miles it came on again so I took it to another garage they also said it was the expansion tank sensor I told them I’ve had a new one fitted then they said it could be the water pump/ thermostat. Anyone got any ideas please.
