P1224 – Knock Sensor Signal High (BMW)

Description

P1224 BMW indicates the knock sensor signal is higher than expected.

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Symptoms

  • Hesitation
  • Reduced power
  • Misfire

Causes

  • Sensor failure
  • Mechanical noise
  • Wiring fault

Diagnosis

  • Check sensor voltage
  • Inspect engine noise
  • Check wiring

Repair

  • Replace sensor
  • Repair wiring
  • Investigate mechanical noise