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P0324moderate severityPowertrain

Knock Control System Error

on 2007 Mercedes-Benz S65 AMG 6.0L V12 BiTurbo M275 · RWD

What this code means

The knock control system has detected a fault in its own monitoring or processing. The PCM cannot reliably adjust timing to prevent detonation.

Symptoms

  • Reduced engine power
  • Pinging or knocking noise
  • Check engine light on

Common causes

  • Faulty knock sensor
  • Knock sensor wiring fault
  • PCM knock module fault
  • Excessive engine noise/mechanical issue

Diagnostic steps

  1. Scan for knock sensor codes
  2. Inspect knock sensor wiring
  3. Test knock sensor resistance
  4. Verify sensor torque and mounting

Other Powertrain codes on this vehicle

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