my Volkswagen Passat B8 (2015-2022) is using too much fuel what's the issue

Solution

1. Preparation

• Gather tools and parts before starting the repair.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Safety warning: Disconnect the battery before beginning work on the fuel system.

2. Inspect and Replace Air Filter

• Remove the air filter housing cover using a socket set.
• Take out the old air filter and inspect it for dirt and restrictions.
• Install a new air filter, ensuring it sits properly in the housing.
• Reattach the air filter housing cover securely.

3. Clean or Replace Fuel Injectors

• Remove the fuel rail by loosening the bolts with a socket set.
• Carefully disconnect the fuel lines, using a rag to catch any spills.
• If cleaning, use a fuel injector cleaning kit; if replacing, install new injectors.
• Reassemble the fuel rail and ensure all connections are secure.

4. Replace Spark Plugs

• Remove the ignition coil packs using a socket set.
• Unscrew the spark plugs using a spark plug socket.
• Check the gap on new spark plugs and adjust if necessary.
• Install new spark plugs and reattach the ignition coils.

5. Verify MAF Sensor Functionality

• Disconnect the MAF sensor connector.
• Clean the sensor with MAF cleaner, allowing it to dry.
• Reconnect the sensor and clear any error codes from the OBD-II scanner.