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Home >> Hyundai >> 2006 >> Elantra Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System (G4GC-GSL 2.0) >> DTC Troubleshooting Procedures >> DTC P2251 Ho2S Reference Ground Circuit/Open-Bank 1 Sensor 1 >> DTC Description

DTC Description

The PCM monitors front O2 sensor signal level during fuel cut-off operation. This signal monitoring will determine open circuit of Reference Ground Circuit (PCM pin No. 53). The PCM sets DTC P2251 if front O2 signal during fuel cut-off is higher than predetermined threshold. If the same error code is set in the next driving cycle, the PCM illuminates the MIL

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