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Home >> Kia >> 2012 >> Optima Hybrid >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System Diagnosis (2 Of 2) - HEV >> DTC P2251: O2 Sensor Reference Ground Circuit Open-Bank 1 Sensor 1 >> General Information >> DTC Description
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DTC Description

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