Engine light

[Barry horn]

Hi guys . 

I've recently bought a 2014 insignia 2.0 cdti 

It's had engine light on since I've got it . I've replaced the maf today with a brand new bosch one erased the fault code but had come back on . 

P0101 code . Maf performance in correct 

Any idea what else it could be please guys . Don't want to throw loads of money at diffo parts . Rather fix the actual problem 

 

Cheers