how to fix P0021 code in Ford Explorer Fifth Generation (2011-2019)

Learn how to diagnose and fix P0021 VVT issue in Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down if it has been running.

2. Oil Change (If Required)

• 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 to lubricate the gasket of the new filter.
  3. Refill the engine with the manufacturer-recommended oil type and quantity.
• Tools Required: Oil filter wrench, socket set, oil drain pan.

3. VVT Solenoid Replacement

• Sub-steps:
  1. Locate the VVT solenoid on the engine; it is typically mounted on the engine near the camshaft.
  2. Disconnect the electrical connector from the solenoid.
  3. Remove the mounting bolts using a socket set and carefully pull out the solenoid.
  4. Install the new VVT solenoid by reversing the removal steps and ensuring it is securely fastened.
• Tools Required: Socket set, torque wrench.

4. Timing Chain/Belt Inspection and Adjustment (If Necessary)

• Sub-steps:
  1. Remove any components obstructing access to the timing chain/belt (e.g., engine covers).
  2. Check the timing marks on the camshaft and crankshaft to ensure they align properly.
  3. If misaligned, adjust the timing by loosening the tensioner and repositioning the chain/belt.
  4. Reassemble any removed components and ensure all bolts are torqued to manufacturer specifications.
• Tools Required: Torque wrench, socket set.

5. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0021 code.
• Safety Warnings: Ensure the vehicle is in a safe position and that all tools are removed from the engine bay before reconnecting the battery.