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Optima Limited
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Engine Control System Diagnosis (3 Of 3) - 2.0L (Except HEV)
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DTC P2251: O2 Sensor Reference Ground Circuit Open (Bank 1/Sensor 1)
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General Information
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Diagnostic Circuit Diagram
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Diagnostic Circuit Diagram
Fig 1: Oxygen Sensor Circuit Diagram (Bank 1 Sensor 1)
Courtesy of KIA MOTORS AMERICA, INC.
Courtesy of KIA MOTORS AMERICA, INC.