EGR problems Cardiff

EGR faults can block a DPF again and again.

A sticking or restricted EGR valve can cause poor running, smoke, airflow faults, limp mode and repeated DPF blockage. We check the EGR fault in context instead of treating the DPF as the only problem.

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Common EGR symptoms

  • P0400, P0401, P0402, P0403 or P0404 codes
  • Rough idle, smoke or poor acceleration
  • Limp mode and airflow faults
  • DPF regeneration failing repeatedly
  • Excessive soot build-up

EGR faults can affect air mass readings, combustion temperature and soot production. That is why EGR diagnosis matters before DPF cleaning or regeneration.

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