DTC codes / Volkswagen codes / P1247
P1247 on Volkswagen diesel engines indicates that the engine control module has detected an open circuit or a short to battery voltage in the needle lift sensor circuit. The needle lift sensor, mounted inside the fuel injector, reports the exact moment fuel injection begins, and the ECM uses this signal to fine-tune injection timing. When the circuit is open or shorted to B+, the ECM loses this feedback and sets the code.
Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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