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Home >> Hyundai >> 2014 >> Tucson GLS, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L (2 Of 2) >> DTC P2251: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> DTC Information >> DTC Description

DTC Description

ECM/PCM assumes the ground circuit is open and shows P2251 when upstream O2 sensor is 1.49~1.53V and internal resistance gets high.

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