Cummins Fault Code

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1896 (SPN 2791 FMI 13)

Power loss (derate); Black smoke; Rough idle; Increased soot load in DPF.

System

Not specified

Symptom

Power loss (derate); Black smoke; Rough idle; Increased soot load in DPF.

Diagnosis & fix steps

EGR Valve Controller - Out of Calibration. LOGIC: EGR Valve calibration failure. Valve cannot reach fully open or closed stops due to soot or mechanical wear. ACTION: Inspect for carbon buildup in the valve throat. Perform "EGR Valve Calibration" test via scan tool. Check for binding. FIX: Clean carbon from valve and seat; replace EGR Valve assembly if internal gears are stripped.

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Read before you touch anything

  • This is general reference information, not a repair manual. It is for trained, qualified technicians.
  • Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
  • Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
  • You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
  • Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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