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2014 BMW 6 SERIES
4.4L V8 Turbo•AWD•gas•N63•turbo
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Repairs0Labor504Torque138Fluid10DTC2227Battery1Maintenance0Recalls0
P3605moderate severityPowertrain

Start-Stop Climate Control Compensation Fault

on 2014 BMW 6 Series 4.4L V8 Turbo · AWD

What this code means

The auxiliary systems that maintain cabin comfort during engine-off periods (electric A/C compressor or thermal storage) are not functioning.

Symptoms

  • Start-stop deactivates quickly in hot/cold weather
  • Cabin temperature drifts rapidly during stops
  • A/C blows warm air at stops
  • Start-stop durations very short
  • Reduced fuel savings from start-stop

Common causes

  • Electric A/C compressor failure
  • Thermal storage evaporator issue
  • Auxiliary coolant pump fault
  • Electric heater element failure
  • Control module communication error

Diagnostic steps

  1. Check auxiliary A/C compressor operation during engine stop
  2. Monitor cabin temperature drift rate
  3. Test auxiliary coolant pump
  4. Check electric heater circuit
  5. Monitor start-stop inhibit reasons

Repair notes

Replace auxiliary A/C compressor or electric heater. Repair auxiliary coolant pump if cabin heating affected.

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