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Engine-Codes – Nissan – P0021 2002 Nissan Altima Sedan

P0021 2002 Nissan Altima Sedan Code - Intake Valve Timing Control Performance Bank 2

Quick Answer

The P0021 diagnostic trouble code (DTC) for a 2002 Nissan Altima Sedan refers to "Intake Valve Timing Control Performance Bank 2." This code indicates that there is a performance issue with the intake valve timing control for the bank 2 side of the engine. Common causes include Faulty intake valve timing control solenoid, Clogged or dirty oil passages, Timing chain or belt issues. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0021 2002 Nissan Altima Sedan indicates Intake Valve Timing Control Performance Bank 2.
Common causes
Common causes include Faulty intake valve timing control solenoid, Clogged or dirty oil passages, Timing chain or belt issues.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 20, 2024
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Code P0021 2002 Nissan Altima Sedan Description

The P0021 diagnostic trouble code (DTC) for a 2002 Nissan Altima Sedan refers to "Intake Valve Timing Control Performance Bank 2." This code indicates that there is a performance issue with the intake valve timing control for the bank 2 side of the engine. In modern engines, intake valve timing is controlled by the engine control module (ECM) to optimize performance, fuel efficiency, and emissions. The intake valve timing control system adjusts the timing of the opening and closing of the intake valves to ensure optimal performance under different driving conditions.

OBDII Code P0021 2002 Nissan Altima Sedan - Intake Valve Timing Control Performance Bank 2
P0021 2002 Nissan Altima Sedan Code - Intake Valve Timing Control Performance Bank 2

Common Causes of P0021 2002 Nissan Altima Sedan

  1. Faulty intake valve timing control solenoid
  2. Clogged or dirty oil passages
  3. Timing chain or belt issues
  4. Electrical system malfunctions
  5. ECM software issues

Symptoms of P0021 2002 Nissan Altima Sedan

  1. Decreased engine performance
  2. Reduced fuel efficiency
  3. Rough idling or stalling
  4. Engine misfires
  5. Illumination of the check engine light

How to Fix P0021 2002 Nissan Altima Sedan

  1. Use a scan tool to diagnose the specific cause of the issue
  2. Inspect and replace the intake valve timing control solenoid if faulty
  3. Clean or replace clogged oil passages
  4. Check and adjust timing chain or belt if necessary
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved

Cost to Fix P0021 2002 Nissan Altima Sedan

The cost of repairing the intake valve timing control performance issue on a 2002 Nissan Altima Sedan can vary depending on the specific cause of the problem. In general, parts for this repair can range from $100 to $300, while labor costs can range from $150 to $400. Overall, the total repair cost can range from $250 to $700. It's important to note that the actual cost may vary based on the location of the repair shop, the specific diagnosis time, and the labor rates in that area. It's recommended to get quotes from multiple repair shops to find the best price for this repair.

What does this mean?

Tech Notes for P0021 2002 Nissan Altima Sedan

Since the Intake valve timing control solenoid valve uses oil flow to control timing, dirty oil can cause the valve to stuck open or close. Before replacing the valve, change engine oil and filter and reset engine code.

When is the Code Detected?

When there is a gap between angle of target and phase-control angle degree, the valve will stop working and the ECM will trigger the P0021 code.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0021 2002 Nissan Altima Sedan Code

1. What are common symptoms of OBDII code P0021 on a 2002 Nissan Altima Sedan?

- Common symptoms include engine misfires, rough idling, reduced power and acceleration, and potentially stalling.

2. What does the OBDII code P0021 "Intake Valve Timing Control Performance Bank 2" mean for a 2002 Nissan Altima Sedan?

- This code indicates that there is a problem with the intake valve timing control system on bank 2 of the engine.

3. What are the possible causes of OBDII code P0021 on a 2002 Nissan Altima Sedan?

- Possible causes include a faulty intake valve timing control solenoid, clogged oil passages, low engine oil level, or issues with the engine's timing chain.

4. How can I diagnose the cause of OBDII code P0021 on my 2002 Nissan Altima Sedan?

- Diagnosing this code may involve checking the oil level and quality, inspecting the timing chain and related components, and testing the intake valve timing control solenoid.

5. Can I continue driving my 2002 Nissan Altima Sedan with OBDII code P0021?

- It is not recommended to continue driving with this code as it can lead to further engine damage and potentially more costly repairs.

6. How can I repair OBDII code P0021 on my 2002 Nissan Altima Sedan?

- Repairing this code may involve replacing the intake valve timing control solenoid, cleaning out any clogged oil passages, ensuring proper engine oil levels, or addressing issues with the timing chain.

7. Are there any maintenance tips to prevent OBDII code P0021 on a 2002 Nissan Altima Sedan?

- Regularly changing the engine oil and following the manufacturer's recommended maintenance schedule can help prevent issues that may trigger this code.

8. Can a DIY enthusiast fix OBDII code P0021 on a 2002 Nissan Altima Sedan?

- Depending on the skill level and experience of the individual, some DIY enthusiasts may be able to address this code themselves by following repair guides and using the necessary tools.

9. How much does it typically cost to repair OBDII code P0021 on a 2002 Nissan Altima Sedan?

- The cost of repair can vary depending on the specific cause of the code, but it may range from $200 to $600 or more, including parts and labor.

10. Will resetting the OBDII code P0021 on my 2002 Nissan Altima Sedan make it go away permanently?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

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