A180 (2016) 1.5 Diesel - Auto - Engine Preglow Dashboard Light solid ON

[divettri]

Hi, I was driving home from work & noticed almost immediately I pulled off that the Preglow Dashboard illumination had remained on & solid (not flashing). I drove approx. 1 mile down the road, away from work & stopped the car. I restarted it & it remained illuminated. I revved the engine (in Park mode) & it topped out at 3000rpm. I then drove home (10 miles) & it remained illuminated for the whole journey.

Does anyone know what the cause of this may be? What should I do (apart from the obvious - take to a mechanic)?

Warranty expired in May (during Covid-19) pandemic so all service centres were / are closed.

Thanks,
Ricki