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Home >> BMW >> 2013 >> 135is 2D Convertible, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - N55 - Diagnostic Trouble Codes - DTC P0234 (BMW DTC 120208) Through DTC P10F6 (BMW DTC 135B12) >> DTC P2251; BMW DTC 12BD60: Oxygen sensor before catalytic converter, line fault: Open circuit, virtual ground >> Fault description

Fault description

The diagnostic function monitors the internal resistance and the output voltage of the oxygen sensor before the catalytic converter.

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