how to fix P0021 code in Volkswagen Golf Eighth Generation (2020-present)?

Learn how to diagnose and fix P0021 VVT system issue in Volkswagen Golf (2020-present). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace VVT Solenoid

1. Locate the VVT Solenoid: Find the solenoid on the engine, typically near the camshaft cover.
2. Remove Electrical Connector: Carefully disconnect the electrical connector from the solenoid.
3. Unbolt the Solenoid: Use a socket set to remove the bolts securing the solenoid.
4. Remove the Solenoid: Gently pull the solenoid out of its mounting location.
5. Install New Solenoid: Place the new solenoid in position and secure it with bolts. Torque bolts to the manufacturer's specifications (usually around 10 Nm).
6. Reconnect Electrical Connector: Ensure the connector is securely attached.

3. Change Engine Oil

1. Drain Old Oil: Remove the oil drain plug and allow the old oil to completely drain into a suitable container.
2. Replace Oil Filter: Remove the old oil filter using an oil filter wrench and replace it with a new one.
3. Add New Oil: Reinstall the drain plug and fill the engine with the recommended oil type (typically 5W-30) up to the correct level.

4. Clear Codes and Test Drive

1. Reconnect Battery: After completing repairs, reconnect the battery.
2. Clear Error Codes: Use the OBD-II scanner to erase the P0021 code.
3. Test Drive the Vehicle: Drive the vehicle for a short distance to verify that the engine operates smoothly and the check engine light does not reappear.