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P1127 – HYUNDAI

Code : P1127
Make : HYUNDAI
Description : P1127 HYUNDAI Long Term Fuel Trim Error System Rich
Possible causes :
– Faulty HO2S
– HO2S harness is open or shorted
– HO2S circuit poor electrical connection
– Leaking pressure regulator or fuel injector
– Engine mechanical condition
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.

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