Cummins Fault Code

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FC 1922

Filter light flashes. If ignored, engine will severely derate and eventually "Lock Out."

System

Not specified

Symptom

Filter light flashes. If ignored, engine will severely derate and eventually "Lock Out."

Diagnosis & fix steps

ACTION: 1. Attempt "Parked Regen" via dash switch. 2. Check Orange 5V ref at DPF Delta sensor. 3. Inspect pressure tubes for cracks.

Red Seal field insights

Look at the DPF pressure tubes. If they are soft or have holes, the sensor gets a false reading. Replacing a $20 hose often fixes a $2,000 "failed" DPF code.

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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