- Effectiveness of Cleaning: Generally, cleaning O2 sensors is not widely recommended. The delicate nature of these sensors means that any cleaning attempt can potentially cause more harm than good.
- Cleaning Methods: If you decide to proceed, avoid using harsh chemicals like carb cleaner. These can leave residues that might impair sensor function. Some mechanics recommend soaking in gasoline or using specific O2 sensor cleaners, but results can vary.
- Impact on Mileage: Clean O2 sensors can indeed improve gas mileage, as they provide accurate readings for the fuel-air mixture. However, if the sensors aren't the root cause of the mileage issue, cleaning them might not have a noticeable impact.
- Replacement vs. Cleaning: Given the age and mileage of your vehicle, if you're unsure about the sensors' history, it might be more effective to replace them. New sensors will provide accurate readings and could be a more reliable fix for your mileage concerns.
- Other Factors: Since you're already doing a tune-up, ensure to address other potential factors affecting gas mileage, such as spark plug condition, air filter cleanliness, and overall engine health.
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