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2011 MERCEDES-BENZ S65 AMG
6.0L V12 BiTurbo M275•RWD•AUTOMATIC•gas•M275•turbo
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Repairs423Labor488Torque3420Fluid8DTC1538Battery1Maintenance0Recalls0
P0493moderate severityPowertrain

Cooling Fan Speed

on 2011 Mercedes-Benz S65 AMG 6.0L V12 BiTurbo M275 · RWD

What this code means

The PCM has detected that the cooling fan speed does not match the commanded value. This can lead to inadequate engine cooling.

Symptoms

  • Engine overheating
  • Fan running too slow or fast
  • Warning lamp on

Common causes

  • Faulty cooling fan motor
  • Faulty fan control module
  • Damaged wiring or connector
  • Faulty PCM

Diagnostic steps

  1. Scan for stored codes
  2. Compare commanded vs actual fan speed
  3. Inspect fan wiring and connectors
  4. Test fan module and motor
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