Hyundai Accent Mass Air Flow Sensor Replace/Remove

I Just Had The Mass Air Flow Sensor Replaced And Now Less Than A Week Later The Engine Light Is On Again. The Dealer Says The Code Is P1123...

2000 Hyundai Accent Is There A Fuse,fusable Link Or A Circuit Breaker That I Should Check Before Replacing My Mass Air Flow Meter...

I Have A 95 Hyundai Accent I Just Put In A New Battery, Starter, Fuel Pump And Air Flow Sensor It Still Wont Start It Does Turn The Engine...