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2024 MINI COOPER SE
Electric•FWD•AUTOMATIC•ev
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor314Torque4618Fluid5DTC1878Battery1Maintenance0Recalls2
30FFhigh severityPowertrain

Boost Pressure Control Deviation - Pressure Too Low

on 2024 Mini Cooper SE Electric · FWD

What this code means

The turbocharger boost pressure is below the commanded setpoint and cannot reach target (OBD P0299). The ECU detects underboost, often triggering reduced power mode.

Symptoms

  • Loss of power
  • Limp mode
  • Check engine light

Common causes

  • Boost/charge air leak
  • Faulty wastegate or actuator
  • Faulty boost pressure sensor
  • Turbocharger wear or failure

Diagnostic steps

  1. Read boost actual vs target values
  2. Inspect charge pipes for leaks
  3. Test wastegate actuator operation
  4. Check boost pressure sensor and turbo
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