my Honda Civic 10th Generation (2016-2021) is using too much fuel

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down completely before starting work.

2. Replace Air Filter

• Remove the engine cover (if equipped).
• Locate the air filter housing and unclip or unscrew it.
• Remove the old air filter and clean the housing.
• Install a new air filter (ensure it is the correct part for your model).
• Reattach the housing and engine cover.

3. Test and Clean Fuel Injectors

• Using a fuel injector cleaning kit, connect it to the fuel rail.
• Follow the manufacturer's instructions to clean the injectors.
• Alternatively, replace any faulty fuel injectors if cleaning does not resolve issues.

4. Check and Replace Oxygen Sensors

• Locate the upstream and downstream oxygen sensors using a repair manual.
• Disconnect the electrical connectors and unscrew the sensors from the exhaust system.
• Install new oxygen sensors and reconnect the electrical connectors.

5. Inspect and Adjust Tire Pressure

• Use a tire pressure gauge to check the pressure of all tires.
• Inflate tires to the manufacturer's recommended pressure, which can be found on the driver's door jamb or in the owner's manual.