Practice question

A school bus diesel forces frequent active regenerations and the operator reports it never seems to finish. The technician should investigate:

  1. Excessive engine-out soot (faulty injectors, low boost, EGR issues) and interrupted/aborted regeneration conditions
  2. The cabin radio settings
  3. The seat upholstery
  4. The tire brand

Answer: A — Excessive engine-out soot (faulty injectors, low boost, EGR issues) and interrupted/aborted regeneration conditions

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Practice more: ASE S2 Diesel Engines (School Bus) Practice Questions - ASE S2 - Diesel Engines (School Bus) Certification Exam →