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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0021

3 min read

575 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

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

Error Code

P0021

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool completely before starting repairs to avoid burns.

Symptoms

•Check engine light illuminated
•Engine may experience rough idling
•Loss of power or acceleration
•Decreased fuel efficiency
•Engine stalling or misfiring under load
•Unusual engine noises such as knocking or ticking

Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes and note any additional codes related to the VVT system.
2
Check the oil level and condition; low or dirty oil can affect VVT operation.
3
Inspect the VVT solenoid for proper operation and signs of damage or blockage.
4
Examine the timing chain/belt for wear or misalignment.
5
Test the VVT sensor for proper voltage and ground using a multimeter.
6
Review the engine oil pressure to ensure it meets specifications.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Oil filter wrench
•Oil drain pan
•Timing tool kit
•Multimeter

Parts Required

•VVT solenoid
•Engine oil (5W-20 or 5W-30)
•Oil filter

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes and note any additional codes related to the VVT system.
2
Check the oil level and condition; low or dirty oil can affect VVT operation.
3
Inspect the VVT solenoid for proper operation and signs of damage or blockage.
4
Examine the timing chain/belt for wear or misalignment.
5
Test the VVT sensor for proper voltage and ground using a multimeter.
6
Review the engine oil pressure to ensure it meets specifications.

Solution

1. Preparation

Gather required tools and parts.
Disconnect the battery to ensure safety during repairs.
Allow the engine to cool down before starting work.

2. Inspect and Replace the VVT Solenoid

Tools Required: Socket set, torque wrench, oil catch pan.
Remove the engine cover (if applicable) by unscrewing the bolts.
Locate the VVT solenoid on the engine.
Disconnect the electrical connector from the VVT solenoid.
Remove the solenoid by unscrewing the mounting bolts; use the oil catch pan to catch any leaking oil.
Install the new VVT solenoid by reversing the removal steps and torque the bolts to the manufacturer's specifications (typically around 89 in-lbs).

3. Check and Replace Engine Oil

Tools Required: Oil filter wrench, oil drain pan, funnel, new engine oil, and filter.
Drain the old engine oil using the oil drain pan.
Replace the oil filter to prevent contamination.
Refill the engine with the appropriate type and amount of oil as specified in the owner’s manual (usually 5W-20 or 5W-30).

4. Inspect Timing Chain/Belt

Tools Required: Timing tool kit, socket set.
Remove any components obstructing access to the timing chain/belt (e.g., front cover).
Inspect the timing chain/belt for wear, slack, and alignment.
If damaged, replace the timing chain/belt following manufacturer specifications.

5. Clear Codes and Test Drive

Reconnect the battery and use an OBD-II scanner to clear the P0021 code.
Test drive the vehicle to verify that the check engine light does not return.