P1141 – Lambda Adaptation Fault (BMW)

Description

P1141 BMW indicates the ECU cannot adapt lambda values correctly.

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Symptoms

  • Rough idle
  • Hesitation
  • High fuel trims

Causes

  • Air leak
  • Sensor drift
  • Fuel pressure issue

Diagnosis

  • Check fuel trims
  • Inspect intake
  • Test fuel pressure

Repair

  • Fix intake leaks
  • Replace sensor
  • Repair fuel system