how to fix P0021 code in Tesla Outback 4th Generation (2010-2014)

Learn how to diagnose and fix P0021 VVT system issues in Subaru Outback (2010-2014). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to ensure safety during repair.

2. Replace Engine Oil and Filter

• Sub-steps:

  1. Drain the old engine oil using a socket set to remove the oil pan bolt.
  2. Replace the oil filter with a new one, ensuring the rubber O-ring from the old filter is not stuck on the engine.
  3. Refill with fresh engine oil that meets Subaru specifications.

• Tools Required:

  • Socket set
  • Oil filter wrench
  • Oil catch pan

3. Inspect and Replace VVT Solenoid

• Sub-steps:

  1. Locate the VVT solenoid on the engine (usually near the camshaft cover).
  2. Disconnect the electrical connector and remove the mounting bolts using a socket set.
  3. Replace with a new VVT solenoid and torque the bolts to manufacturer specifications.
  4. Reconnect the electrical connector.

• Tools Required:

  • Socket set
  • Torque wrench

4. Check Camshaft Timing

• Sub-steps:

  1. Remove the timing cover to access the camshaft timing gear.
  2. Align the timing marks on the camshaft and crankshaft according to the service manual.
  3. If misaligned, adjust the timing gear and retighten bolts to specifications.
  4. Reinstall the timing cover.

• Tools Required:

  • Timing tool kit (if necessary)
  • Torque wrench

5. Clear Codes and Test Drive

• Sub-steps:

  1. Reconnect the negative battery terminal.
  2. Use an OBD-II scanner to clear the P0021 code.
  3. Start the engine and let it idle for a few minutes.
  4. Take the vehicle for a test drive to ensure the issue is resolved.

• Tools Required:

  • OBD-II scanner