my Toyota Corolla E170 (2013-2019) has a low fuel economy, what are the causes

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a level surface and securely supported.
• Disconnect the battery to prevent any electrical issues during the repair.

2. Replace Air Filter

• Locate the air filter housing.
• Unclip or unscrew the housing cover.
• Remove the old air filter and clean the housing interior.
• Install the new air filter, ensuring it fits snugly.
• Reattach the housing cover securely.

3. Clean or Replace MAF Sensor

• Locate the MAF sensor in the air intake duct.
• Disconnect the electrical connector carefully.
• Remove the MAF sensor using the appropriate socket.
• Clean the MAF sensor with MAF sensor cleaner (do not use other cleaners).
• If damaged, replace with a new MAF sensor and reconnect the electrical connector.

4. Inspect and Clean Fuel Injectors

• Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel lines and electrical connectors from the injectors.
• Remove the fuel injectors using the appropriate socket.
• Clean the injectors with a dedicated fuel injector cleaning solution or replace them if clogged.
• Reinstall the cleaned or new injectors and reconnect the fuel lines securely.

5. Check and Replace Tire Pressure

• Use a tire pressure gauge to check the pressure in each tire.
• Inflate the tires to the manufacturer’s recommended PSI as found on the door jamb label.
• Inspect tires for uneven wear or damage and replace if necessary.