Toyota Fault Code

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P2458

Frequent DPF warning; Engine derate; Fuel smell in oil.

System

Not specified

Symptom

Frequent DPF warning; Engine derate; Fuel smell in oil.

Diagnosis & fix steps

DPF Regeneration Duration Error. LOGIC: The DPF cleaning cycle is taking too long to complete (Soot won't burn off). ACTION: 1. Check the "5th Injector" (Exhaust Fuel Addition Valve) for clogging. 2. Check differential pressure sensor hoses. FIX: Clean or replace the 5th Injector; perform a forced regeneration.

Red Seal field insights

The 5th injector in the exhaust is famous for carboning up. If it's blocked, no fuel gets to the DPF to burn the soot, and the regen will fail every time.

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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