Common Symptoms
- Check Engine Light illuminated
- Slight reduction in fuel economy
- Failed emissions test
- Occasional sulfur smell from exhaust
- No noticeable drivability issues in most cases
Most Likely Root Causes
- Degraded or failed catalytic converter on Bank 2
- Faulty downstream oxygen sensor reading
- Exhaust leak near oxygen sensors
- Engine running rich causing catalyst damage
- Contaminated catalyst from coolant or oil consumption
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Component Location
Bank 2 catalytic converter is located in the exhaust system on the side of the engine opposite cylinder number one.
Manufacturer Notes
Some manufacturers require specific drive cycles after catalyst replacement to allow the ECM to relearn efficiency parameters.
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