P1511 on BMW vehicles indicates that the engine control module (DME) has detected an electrical fault in the control circuit for the DISA (Dual Intake System Adjuster) valve. The DME monitors the circuit for open, short, or out-of-range resistance and sets this code when the expected current or voltage is not present.
Guidance is general and written for BMW vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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