how to fix P0021 code in Volvo XC60 Second Generation (2018-2024)

Learn how to diagnose and fix P0021 camshaft timing issue in Volvo XC60 (2018-2024). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the vehicle's battery to ensure safety while working on electrical components.

2. Change Engine Oil

• Sub-steps:
  1. Drain the old engine oil using an oil drain pan.
  2. Replace the oil filter.
  3. Refill the engine with the manufacturer-recommended oil type and capacity (typically 0W-20 or 5W-30).
• Tools Required: Oil drain pan, socket set, oil filter wrench, funnel.
• Safety Warnings: Allow engine to cool before draining oil to prevent burns.

3. Replace VVT Solenoid

• Sub-steps:
  1. Locate the VVT solenoid (usually near the camshaft).
  2. Disconnect the electrical connector.
  3. Remove the mounting bolts and take out the solenoid.
  4. Install the new VVT solenoid, ensuring proper alignment and secure mounting.
  5. Reconnect the electrical connector.
• Tools Required: Socket set, torque wrench.
• Safety Warnings: Ensure battery is disconnected to prevent short circuits.

4. Verify Camshaft Timing

• Sub-steps:
  1. If necessary, remove the timing cover to access the camshaft timing mechanism.
  2. Align the timing marks according to the service manual specifications.
  3. Adjust the timing if it is out of specification.
  4. Reassemble the timing cover and ensure all bolts are torqued to specification.
• Tools Required: Timing tool set, torque wrench.
• Safety Warnings: Ensure all components are properly secured before starting the engine.