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

Learn how to diagnose and fix P0021 code related to VVT system in Tesla Outback (2010-2014). 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 level surface with the engine off.
• Disconnect the negative battery terminal.

2. Inspect and Replace the VVT Solenoid

• Tools Required: Socket set, torque wrench, multimeter
• Sub-steps:
  1. Locate the VVT solenoid on the engine. It is typically mounted on the cylinder head.
  2. Disconnect the electrical connector from the VVT solenoid.
  3. Remove the bolts securing the VVT solenoid using a socket wrench.
  4. Carefully remove the solenoid from its mounting location.
  5. Inspect the solenoid and the O-ring for wear or damage.
  6. If defective, replace with a new VVT solenoid. Torque bolts to manufacturer specifications.

3. Check and Replace Engine Oil

• Tools Required: Oil catch pan, wrench, oil filter wrench
• Sub-steps:
  1. Drain the old engine oil using an oil catch pan.
  2. Replace the oil filter if it shows signs of wear.
  3. Refill the engine with fresh oil meeting manufacturer specifications (typically 5W-30).
  4. Start the engine and allow it to run for a few minutes, checking for leaks.

4. Inspect Timing Chain/Belt

• Tools Required: Socket set, torque wrench
• Sub-steps:
  1. Remove any components obstructing access to the timing cover.
  2. Inspect the timing chain/belt for wear, slack, or misalignment.
  3. If damaged, replace the timing chain/belt following manufacturer guidelines.