- Intake leak
- Exhaust leak
- Fuel Injector leakage
- Defective front O2 sensor
- Defective Mass Air Flow Meter (MAF)
- Defective Coolant Temperature Sensor (ECT)
- Defective Manifold Absolute Pressure Sensor (MAP)
If your Catalytic Converter failed, you have a problem somewhere else in your vehicle too. Unless you fix the problem you will void the warranty of your new Catalytic Converter. Here is a list of common problems that cause Catalytic Converter failure:
- Oil – Bad rings or Valve seals
- Sulfur – found in some low quality gasoline
- Silicone – found in most Gasket sealants unless marked “O2 sensor safe”
- Coolant – damaged head gaskets or Intake plenums
Following are the more common contaminants that will affect O2 and Converter performance:
Information complements of Magnaflow Catalytic Converters
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