P1231 – Torque Limitation Active (BMW)

Description

P1231 BMW indicates the ECU is actively limiting engine torque.

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Symptoms

  • Reduced power
  • Hesitation
  • Poor acceleration

Causes

  • Engine protection mode
  • Airflow issue
  • Sensor fault

Diagnosis

  • Check torque request
  • Inspect airflow
  • Scan DME

Repair

  • Repair airflow
  • Replace sensor
  • Fix ECU logic

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