how to fix P0021 code in Volkswagen Golf Seventh Generation (2013-2020)

Learn how to diagnose and fix P0021 VVT system issue in Volkswagen Golf (2013-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather the necessary tools and parts.
• Disconnect the battery to ensure safety.
• Allow the engine to cool before working on it.

2. Inspect Oil Level and Condition

• Remove the oil dipstick and check the level; add oil if low.
• If the oil appears dark or has particles, perform an oil change.
  • Tools Required: Oil filter wrench, socket set, oil catch pan.
  • Safety Warnings: Allow the engine to cool before draining oil.

3. Replace VVT Solenoid

• Locate the VVT solenoid, typically found on the engine near the camshaft.
• Disconnect the electrical connector and remove the mounting bolts.
• Replace with the new solenoid, ensuring a proper fit.
• Reconnect the electrical connector and secure the solenoid.
• Tools Required: Socket set, torque wrench.
• Torque Specifications: Refer to the service manual for specific torque values.

4. Adjust Timing (if necessary)

• If the timing is off, remove the timing cover to access the timing chain/belt.
• Align the timing marks according to the manufacturer's specifications.
• Replace the timing components if worn or damaged.
• Reassemble all removed components and reconnect battery.

5. Clear Codes and Test Drive

• Use the OBD-II scanner to clear the P0021 code.
• Test drive the vehicle to ensure that the issue is resolved and the check engine light remains off.