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Home >> Kia >> 2019 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System Diagnosis (5 Of 6) (PHEV) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> DTC Information >> DTC Description
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DTC Description

The PCM monitors front O2 sensor reference voltage circuit (VN) and sets DTC P225100 if front O2 sensor signal stuck is detected.

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