Hi please help vrs tdi cr ... glow plug light coming on when car is warm and driving .. no limp mode and drives well .. Connect diag machine but said no fault codes stored ... Any advice please ..

I’m having the same problem but mine is from cold and stops when warm,, no loss of power also. But I do have EML on but that’s for boost control position sensor P2563,,,, I did have a key  and fob coded to the car and the lad did read codes and one for O2 sensor was there but my cheap reader don’t pick that one up. I’m thinking of changing sensor and see if that helps