OBD Diagnostics for Exhaust System Restrictions

Exhaust restrictions limit airflow out of the engine, reducing power and increasing heat. OBD exhaust restriction diagnostics help identify blockages before serious damage occurs.

Common Causes of Exhaust Restrictions

Clogged Catalytic Converters

Excessive soot or melted catalyst material.

Collapsed Exhaust Pipes

Internal pipe damage restricting flow.

How OBD Detects Restrictions

Pressure and Temperature Trends

Rising exhaust temperature indicates restricted flow.

Sensor Correlation

OBD compares upstream and downstream sensor data.

Benefits of Exhaust Diagnostics

• Restores engine power

• Reduces overheating risk

• Improves fuel efficiency

Conclusion

OBD diagnostics provide early warning of exhaust system blockages.