Deutz Fault Code

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SPN 651 FMI 5

Engine knocking or "missing"; Significant vibration; Power loss.

System

Not specified

Symptom

Engine knocking or "missing"; Significant vibration; Power loss.

Diagnosis & fix steps

Injector Cylinder 1 Open Circuit LOGIC: ECM detects no current flow to the #1 injector solenoid. ACTION: Check the harness connector at the valve cover. Measure resistance of injector (usually < 2.0 ohms). FIX: Repair harness break or replace Injector #1.

Red Seal field insights

On Deutz TCD engines, the internal injector harness under the valve cover can rub through and short out against the rocker assembly.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

Book an uptime review

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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