how to fix P0021 code in Honda CR-V Fifth Generation (2017-2022)

Honda CR-V Sixth Generation (2023-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0021

3 min read

549 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 VVT system issue in Honda CR-V (2017-2022). Step-by-step guide with symptoms, diagnostic steps, 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 systems.
•Allow the engine to cool before opening the oil drain plug or removing components.

Symptoms

•Check engine light illuminated
•Rough idle or engine stalling
•Decreased engine performance or power loss
•Increased fuel consumption
•Unusual engine noise (ticking or knocking)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm the presence of P0021.
2
Inspect the VVT solenoid and wiring for any visible damage or disconnections.
3
Check engine oil level and condition; low or dirty oil can affect VVT operation.
4
Test the VVT solenoid for proper operation using a multimeter.
5
Inspect the timing chain/belt for wear or misalignment.
6
Use a scan tool to monitor VVT sensor readings while the engine is running.

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
•Ratchet and socket set
•Torque wrench
•Oil filter wrench
•Multimeter
•Drain pan
•O-ring pick

Parts Required

•VVT solenoid (if faulty)
•Engine oil (0W-20 synthetic)
•Oil filter

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm the presence of P0021.
2
Inspect the VVT solenoid and wiring for any visible damage or disconnections.
3
Check engine oil level and condition; low or dirty oil can affect VVT operation.
4
Test the VVT solenoid for proper operation using a multimeter.
5
Inspect the timing chain/belt for wear or misalignment.
6
Use a scan tool to monitor VVT sensor readings while the engine is running.

Solution

1. Preparation

Gather required tools and parts.
Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace VVT Solenoid

Tools Required: Ratchet and socket set, torque wrench, O-ring pick.
Remove the engine cover (if applicable) to access the VVT solenoid.
Disconnect the electrical connector from the VVT solenoid.
Remove the bolts securing the VVT solenoid to the engine.
Carefully pull the solenoid out and inspect the O-ring for damage.
If defective, install a new VVT solenoid:
- Lubricate the new O-ring with engine oil.
- Position the solenoid and secure it with bolts to the manufacturer’s torque specifications (typically around 8-10 ft-lbs).
Reconnect the electrical connector.

3. Change Engine Oil and Filter

Tools Required: Oil filter wrench, drain pan, socket set.
Drain the old engine oil using the drain plug. Allow it to fully empty.
Remove the oil filter using the oil filter wrench.
Install a new oil filter, lubricating the rubber gasket with new oil.
Refill the engine with the correct type and amount of oil (typically 0W-20 synthetic for Honda CR-V).
Start the engine and let it run for a few minutes, checking for leaks.

4. Clear Codes and Test Drive

Use an OBD-II scanner to clear the P0021 code.
Take the vehicle for a test drive to ensure the problem is resolved and the check engine light does not reappear.