OBD Diagnostics for Monitoring Exhaust Gas Temperature (EGT) Trends

Exhaust Gas Temperature (EGT) is a critical indicator of combustion health and engine stress. OBD exhaust temperature diagnostics help detect overheating conditions before they cause damage.

Why Exhaust Gas Temperature Matters

Engine Protection

High EGTs can damage valves and pistons.

Turbocharger Safety

Excessive heat shortens turbo lifespan.

Common Causes of High EGT

Lean Fuel Mixtures

Increase combustion temperature.

Restricted Exhaust Flow

Raises backpressure and heat.

How OBD Monitors EGT

Temperature Sensor Data

Tracks exhaust heat in real time.

Load and RPM Correlation

Identifies conditions causing temperature spikes.

Benefits of EGT Diagnostics

• Prevents engine overheating

• Protects turbochargers

• Improves reliability

Conclusion

OBD diagnostics provide early warning of dangerous exhaust temperature trends.