Hyundai Repair: Hyundai Tuburon Code, air flow sensor, vacuum leaks

Question
I have a 2001 Hyundia Tiburon that has the diagnostic code of P1124. What does that mean? What will the estimated cost of this repair be???

Answer
P1124 indicates that the ECM is keeping the injectors longer than expected to achieve the proper fuel mixture.  Unfortunately, we won't konw what repair is required or the cost without performing some diagnosis.  

Check for vacuum leaks, especially at the PCV hose.  If there are no leaks, I'd also recommend checking the fuel pressure, since low fuel pressure can also cause this code.  If there are no leaks and fuel pressure is normal, you probably need a new air flow sensor.