Posts Tagged: oil contamination catalytic converter

Why Catalytic Converters Fail

The Most Common Catalytic Converter Failure Causes Quick Summary When people ask me about the causes of catalytic converter failure, they often assume the converter simply wore out. In reality, that’s rarely the case. After decades of diagnosing check engine lights and emissions problems, I’ve found that most catalytic converters don’t fail on their own—they’re damaged by other engine, fuel, ignition, or exhaust system problems. If you replace a converter without fixing the root cause, the new converter can fail just as quickly as the original. Understanding why catalytic converters … Read More