how to solve P0021 code issue in my Volvo XC60 536 (2017-Present)

Learn how to diagnose and fix P0021 VVT issue in Volvo XC60 536. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to avoid electrical short circuits.
• Allow the engine to cool down completely.

2. Change Engine Oil and Filter

• Sub-steps:
  • Drain the old engine oil using a wrench to remove the oil drain plug.
  • Replace the oil filter with a new one, ensuring the rubber O-ring is lubricated.
  • Reinstall the drain plug and torque it to the manufacturer’s specification.
  • Fill the engine with fresh oil as specified in the owner’s manual.

3. Inspect and Replace VVT Solenoid

• Sub-steps:
  • Locate the VVT solenoid on the engine (refer to the service manual for exact location).
  • Disconnect the electrical connector and remove the mounting bolts using a socket set.
  • Remove the old solenoid and install the new one, ensuring proper orientation.
  • Reconnect the electrical connector and torque the bolts to specification.

4. Check and Replace Timing Chain/Belt (If Necessary)

• Sub-steps:
  • Remove any components obstructing access to the timing cover (e.g., intake manifold, accessories).
  • Follow the manufacturer’s guidelines to remove the timing cover.
  • Inspect the timing chain/belt for wear; if damaged, replace it.
  • Reinstall the timing cover and any components removed, ensuring all bolts are torqued correctly.

5. Reset the Engine Control Module (ECM)

• Sub-steps:
  • Reconnect the negative battery terminal.
  • Use the OBD-II scanner to clear the P0021 code from the ECM.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Oil catch pan
• Wrench set
• Multimeter

Parts Required:

• Engine oil
• Oil filter
• VVT solenoid
• Timing chain/belt (if necessary)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical components.
• Allow the engine to cool before performing maintenance to avoid burns.