Practice question

A diesel coach displays an AdBlue warning before departure. What is the best action?

  1. Ignore it because AdBlue affects only passenger comfort
  2. Top up or follow the operator's defect process before service
  3. Add engine oil to the AdBlue tank
  4. Disconnect the warning lamp

Answer: B — Top up or follow the operator's defect process before service

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Practice more: UK PCV Theory Practice Questions - UK PCV Bus and Coach Driver CPC Part 1 Theory Test Exam →