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2013 MERCEDES-BENZ ML
4.6L Turbo V8•AWD•AUTOMATIC•gas•M278•turbo
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Repairs0Labor506Torque712Fluid8DTC1855Battery2Maintenance0Recalls0
P0259high severityPowertrain

Injection Pump Fuel Metering Control 'B' High (Cam/Rotor/Injector)

on 2013 Mercedes-Benz ML 4.6L Turbo V8 · AWD

What this code means

The PCM detects a high signal in the diesel injection pump fuel metering control circuit 'B'. Improper fuel metering may result in drivability problems.

Symptoms

  • Rough idle
  • Reduced power
  • Excessive smoke

Common causes

  • Faulty metering control valve
  • Short to voltage in circuit B
  • Open circuit in pump wiring
  • Faulty PCM

Diagnostic steps

  1. Read freeze frame data
  2. Inspect circuit B for short to voltage
  3. Test metering valve operation
  4. Repair circuit or replace pump component
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