Cummins Fault Code

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SPN 3242 FMI 15

Regen Aborted / High EGT Warning

System

Emissions / DPF

Symptom

Regen Aborted / High EGT Warning

Diagnosis & fix steps

LOGIC: DPF Intake Gas Temperature High - Least Severe Level. ACTION: Inspect DPF intake temperature sensor wiring for insulation burn damage. Check for unburned engine oil or raw fuel dumping into exhaust from turbo seal leakage or leaking fuel injector.

Red Seal field insights

Thermal Threshold: DPF inlet temperature exceeded ~650°C during active regeneration, prompting the ECM to cut dosing fuel injection to prevent substrate melt-down.

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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