Voltage drops under acceleration (13.7 V → 12.4 V)High alternator duty cycle (~85%)Start/Stop not functioningCEL (engine light) onNoticeable power lag, occasional stallingRecently experiencing long cranking / no startN3 fuseWeak auxiliary batteryFailing alternatorFaulty fuel pump drawing extra current. Since my last periodic service, the battery test showed weak battery and I had several long cranks. They couldn’t pinpoint the root cause and suggested it’s “probably a bad fuel pump” that needs replacement. No other DTCs provided except for a PCM code.I’m not fully convinced — the symptoms seem more electrical.Has anyone run into similar issues? Could this be caused by one or a combination of the following: