P1101 – MAF Sensor Range/Performance (BMW)

Description

P1101 BMW indicates the MAF sensor signal is outside the expected range.

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Symptoms

  • Rough idle
  • Hesitation
  • High fuel trims

Causes

  • MAF contamination
  • Air leak
  • Sensor degradation

Diagnosis

  • Check fuel trims
  • Inspect intake leaks
  • Test MAF

Repair

  • Clean or replace MAF
  • Fix intake leaks
  • Repair wiring