The catalytic converter transforms harmful exhaust gases like carbon monoxide and hydrocarbons into safer compounds through a chemical reaction. Over time, contamination, overheating, or internal damage can cause it to lose efficiency or clog — leading to reduced performance and illuminated check-engine lights.

Common symptoms of converter issues include:

• Reduced acceleration or power loss
• Rotten-egg exhaust odor
• Rattling noises from the converter
• Failed emissions test or P0420/P0430 codes
• Excessive exhaust heat or discoloration

Because converter failure can stem from engine issues upstream (such as misfires or oil burning), our team always diagnoses the root cause first — not just the symptom.

At The Garage MKG, we use scan-tool data, O₂ sensor monitoring, and temperature readings to determine whether the converter itself has failed or if another system caused the fault.

Our service includes:

• Exhaust system inspection and back-pressure testing
• Oxygen sensor evaluation and replacement (if required)
• Removal of the failed converter and precise fitment of a quality OEM or EPA-approved replacement
• Verification of exhaust sealing and proper flow
• Final emissions readiness check and road test

We never install cheap or non-compliant aftermarket converters — only approved components that restore performance and maintain compliance with environmental standards.

Proper maintenance prevents premature failure. After installation, our technicians verify that the engine is running efficiently — checking for misfires, oil burning, and rich fuel conditions that can damage a new converter.

We’ll review your maintenance records and recommend preventive actions such as spark-plug replacement, oil-leak repairs, or fuel-system cleaning. You’ll receive full documentation of our findings in your Complete Vehicle Health Report, giving you transparency and confidence that your new converter will last.

If your check-engine light is on or your vehicle failed an emissions test, schedule catalytic converter diagnostics and repair with The Garage MKG today. Call (231) 246-7735, visit 1860 Henry St, Muskegon, MI, or book online anytime.

We’ll test accurately, repair responsibly, and deliver lasting solutions that protect both your vehicle and the environment.