Walker Exhaust Products

Catalytic Converters

CAUSES OF CONVERTER FAILURE

Cause of Converter Failure - Engine System Diagram
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TYPES OF CONVERTER FAILURE

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High NOx,
Exhaust Emissions

Overheated, Melted
or Broken

Coated / Oil-Fouled Substrate

Structural
Damage

Common Reasons for High NOx issues:

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Engine management diagram provided
courtesy of The National Institute for
Automotive Service Excellence (ASE).
Used with permission.
  • High Cylinder Temperatures
  • High Compression
  • Advanced Ignition Timing
  • EGR System Failure