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

Learn how to diagnose and fix P0021 camshaft timing issues in Volkswagen Golf (2013-2020). Step-by-step guide with tools and procedures.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety during repairs.

2. Change Engine Oil and Filter

• Sub-steps:
  1. Drain the old engine oil into a suitable container.
  2. Replace the oil filter with a new one.
  3. Refill the engine with high-quality engine oil that meets VW specifications (5W-30 or as required).

3. Replace VVT Solenoid

• Tools Required: Socket set, torque wrench, oil catch pan.
• Sub-steps:
  1. Locate the VVT solenoid on the engine (usually near the camshaft).
  2. Disconnect the electrical connector and remove the mounting bolts.
  3. Remove the old solenoid and install the new one.
  4. Torque the mounting bolts to 10 Nm (7.4 lb-ft).
  5. Reconnect the electrical connector.

4. Inspect and Adjust Camshaft Timing

• Tools Required: Camshaft timing tool kit.
• Sub-steps:
  1. Remove the timing cover to access the camshaft.
  2. Use a camshaft timing tool to lock the camshaft in position.
  3. Adjust the timing of the camshaft if necessary to align with the manufacturer specifications.
  4. Reinstall the timing cover with new gaskets.

5. Testing

• Sub-steps:
  1. Reconnect the battery.
  2. Start the engine and let it reach operating temperature.
  3. Monitor for any unusual noises and check for leaks around the VVT solenoid and timing cover.