Hyundai Repair: Diagnostic Codes, air flow sensor, hyundai accent

Question
Hyundai Accent GL 2000 4dr Automatic
Diagnostic Codes:
P0442
P1124
P1128

Answer
Hey, Bubba.  You've got at least two issues.

P0442 means that you have leakage in the fuel vapor management system.  This could be as simple as a loose fuel cap, but could be a leak anywhere in the system.

P1124 and P1128 mean that the ECM (engine control module) has encountered an unexpected lean condition.  You should check for any air entering the intake from a source which would bypass the air flow sensor.  Check to make sure that the intake air hose between the air flow sensor and throttle body is securely attached and does not leak.  Check your pcv hose to be sure it's not split open.  Beyond that, the problem could be a faulty air flow sensor or oxygen sensor, with the air flow sensor being the far more common problem.