engine light

[WOODY T5]

got a prob with my 850 t5 guys my engine management light keeps comeing on and off it stays on more then going off. light was off today so put a spare maf air meter on it tuk it for spin was ok pulled up for 30min start back up lights on anyone ad this prob or can anyone help me on this.

[Rnash2002]

got a prob with my 850 t5 guys my engine management light keeps comeing on and off it stays on more then going off. light was off today so put a spare maf air meter on it tuk it for spin was ok pulled up for 30min start back up lights on anyone ad this prob or can anyone help me on this.
You need to read the codes to get a better idear mate.

[WOODY T5]

went to my local volvo dealer in hull got the codes.first code 535 turbo control fault too low 2nd code 121 air mass too low.