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Hyundai
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2016
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Sonata Plug-In Hybrid
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System Diagnosis (PHEV) (3 Of 3)
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DTC P2251: O2 Sensor Reference Ground Circuit/Open (Bank 1 / Sensor 1)
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Specification
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Signal Waveform & Data
Signal Waveform & Data
Fig 1: Screen Display - Normal Waveform Of Front Heated Oxygen Sensor (S1) (Engine Idle)
Courtesy of HYUNDAI MOTOR AMERICA
CH A1 (Nernst cell voltage), CH A2 (Pump cell voltage), CH B1 (Common ground), CH B2 (Compensative resistance)
Courtesy of HYUNDAI MOTOR AMERICA