Catalytic Converter Replacement in San Antonio, TX

Catalytic Converters

The catalytic converter sits in the exhaust and uses precious metals to turn harmful gases into less harmful ones. It usually lasts a long time. When it fails, something else is often to blame, like an engine misfire, burning oil, or coolant getting into the exhaust.

Signs of a failing converter:

• A check engine light with a catalyst efficiency code, such as P0420 or P0430
• A rattle underneath, from broken material inside the converter
• A rotten egg or sulfur smell from the exhaust
• Sluggish acceleration or poor fuel economy from a clogged converter
• A very loud exhaust, which can mean the converter was cut out and stolen

Fix the cause first

Replacing a converter without fixing why it failed means the new one can fail too. If a misfire, oil burning, or a faulty oxygen sensor is involved, that has to be addressed. We check for those causes, often using vehicle diagnostics, before recommending a converter.

Converter theft is a real problem, especially on trucks and SUVs with higher ground clearance. If yours was cut out, we can replace it and repair the pipes that were damaged.

Part of our muffler shop

Catalytic converter replacement is done at our muffler shop at 12040 O'Connor Rd. Call first and tell us your year, make, and model and what code or symptom you have.