Troubleshooting Mixture Codes on the N54 Engine

Jul 2016 | 1 comment

The 3100 Boost Deactivation is one of the three most encountered diagnostic trouble codes (DTCs) for fuel mixture issues.

The BMW N54 engine which first appeared in the E92 335 coupe is a twin turbo direct injected engine. The HPI system can ...

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1 Comment

  1. PETER LINAU

    AS THESE VEHICLES AGE SO DO THE PLASTIC CYLINDER HEAD COVERS. LEAN MIXTURE CODES OFTEN LEAD TO CRACKED CYLINDER HEAD COVER, NEAR CYLINDER #3 IN CENTER OF COVER, USING A GOOD SMOKE MACHINE HELPS IN FINDING THIS. OIL LEAKS NEARBY ARE ANOTHER CLUE.

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