my Toyota Corolla E210 (2019-2024) has a sudden drop in fuel mileage, what to do?

Solution

1. Preparation

• Gather tools and parts before starting the repair.
• Tools Required: OBD-II scanner, tire pressure gauge, socket set, fuel injector cleaning kit, air filter replacement.
• Safety Warnings: Ensure the vehicle is parked on a level surface and the engine is cool before proceeding.

2. Address Error Codes

• Use the OBD-II scanner to retrieve any error codes.
• Document the codes and research their meanings to identify specific issues.
• Clear the codes after repairs to reset the system.

3. Tire Inspection and Adjustment

• Check all four tires using the tire pressure gauge.
• Inflate tires to the recommended PSI found in the owner’s manual or on the driver’s door jamb.
• Inspect tread depth and condition; replace tires if necessary.

4. Air Filter Replacement

• Locate the air filter housing and unfasten the clips or screws.
• Remove the old air filter and check for signs of dirt or damage.
• Install a new air filter, ensuring it seals properly in the housing.

5. Fuel Injector Cleaning

• Use a fuel injector cleaning kit according to the product instructions.
• Disconnect the fuel line and attach the cleaning kit as directed.
• Run the engine as per the kit instructions to clean the injectors.

6. Exhaust System Inspection

• Visually inspect the exhaust system for any signs of damage or blockages.
• If any leaks or blockages are found, repair or replace the affected components.