OBD Diagnostics for Air-Fuel Ratio Balance

The air-fuel ratio determines how efficiently fuel burns inside the engine. Even slight imbalances can cause performance loss or increased emissions. OBD air-fuel ratio diagnostics help maintain ideal combustion conditions.

Importance of Proper Air-Fuel Ratio

Lean Mixture Effects

Too much air increases combustion temperature and engine stress.

Rich Mixture Effects

Excess fuel reduces efficiency and increases emissions.

OBD Monitoring Methods

Sensor Inputs

• Oxygen sensors

• Mass air flow sensors

• Engine load data

Fuel Trim Analysis

OBD uses short-term and long-term fuel trims to adjust fueling.

Benefits of AFR Diagnostics

• Optimized fuel usage

• Reduced emissions

• Stable engine performance

Conclusion

OBD AFR diagnostics help engines run cleanly and efficiently under all conditions.