why is my Toyota RAV4 getting worse gas mileage lately

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface with the engine off.
• Tools Required: OBD-II scanner, tire pressure gauge, socket set, and screwdriver.

2. Addressing Error Codes

• Use the OBD-II scanner to retrieve codes.
• Research codes for specific issues (e.g., P0420 for catalytic converter efficiency).
• Clear the codes after noting down any issues for further inspection.

3. Tire Inspection and Adjustment

• Check tire pressure with a tire pressure gauge; inflate tires to manufacturer's recommended PSI.
• Inspect for uneven wear or damage; replace if necessary.

4. Air Filter Replacement

• Locate the air filter box, usually on the engine’s top or side.
• Open the air filter housing, remove the old filter, and inspect for dirt and debris.
• Install a new air filter that meets OEM specifications.

5. Fuel System Check

• Inspect fuel lines for leaks and integrity.
• Remove and clean fuel injectors using a fuel injector cleaning kit, or replace if necessary.
• Replace the fuel filter if it hasn't been changed according to the service schedule.

6. Oil Change

• Check engine oil level with the dipstick; add oil if low.
• If oil appears dark or gritty, perform an oil change:
  • Drain the old oil from the oil pan.
  • Replace the oil filter.
  • Add new oil that meets the manufacturer's specifications.