2000 Hyundai Elantra GT error code P1124 fuel trim adaptive air system too lean

Asked by endbegin Mar 02, 2016 at 06:06 PM about the Hyundai Elantra GT

Question type: Maintenance & Repair

2000 Hyundai Elantra GT error code P1124 fuel trim adaptive air system too
lean...How do I find the leak?

1 Answer
220,965

Rowefast answered 8 years ago

P1124 HYUNDAI - Long Term Fuel Trim Error System Lean... Possible causes... - Low fuel pressure - Fuel filter plugged - Fualty fuel pump - Engine mechanical condition - Large vacuum leak..... So check vacuum lines for cracks, snug up the intake manifold, make sure the throttle body gasket is good. Just check anywhere there is a main source of vacuum.

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