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Home >> BMW >> 2012 >> X6 50i >> Repair and Diagnosis >> External Pages >> Different car >> Section 1998 (Self Diagnosis - Diagnostic Trouble Codes - DTC P0035 - DTC P0480 (N63 & S63)) >> Diagnostic Trouble Codes (DTCS) MSD85 - Bn2020 >> DTC P0420, BMW Hex Code 0x180001, BMW Code 1572865: Catalyst System Efficiency Below Threshold (Bank 1) >> Repair procedures (plant/service)

Repair procedures (plant/service)

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-If diagnostic fault codes related to the oxygen sensor are logged, then a secondary fault is present

-Visual inspection of catalyst for mechanical damage

-Check exhaust system for leaks

-If the fault is continuously present or has multiple log entries respond by replacing the catalytic converter

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