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Home >> Kia >> 2012 >> Optima SX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) - 2.0L >> DTC P2251: O2 Sensor Reference Ground Circuit Open (Bank 1/Sensor 1) >> General Information >> DTC Description

DTC Description

The PCM monitors front O2 sensor reference ground circuit (VG) and sets DTC P2251 if front O2 sensor signal stuck is detected.

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