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Engine-Codes – Nissan – P0021 2004 Nissan Maxima

P0021 2004 Nissan Maxima Code - Intake Valve Timing Control Performance Bank 2

Quick Answer

The P0021 diagnostic trouble code (DTC) for a 2004 Nissan Maxima relates to the Intake Valve Timing Control Performance Bank 2. Common causes include Faulty intake valve timing control solenoid, Malfunctioning camshaft position sensor, 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 2004 Nissan Maxima indicates Intake Valve Timing Control Performance Bank 2.
Common causes
Common causes include Faulty intake valve timing control solenoid, Malfunctioning camshaft position sensor, 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 Sep 11, 2024
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Code P0021 2004 Nissan Maxima Description

The P0021 diagnostic trouble code (DTC) for a 2004 Nissan Maxima relates to the Intake Valve Timing Control Performance Bank 2. This code indicates that there is an issue with the performance of the intake valve timing control system on bank 2 of the engine. In a V6 engine like the one found in the 2004 Nissan Maxima, there are two banks of cylinders, with bank 1 typically referring to the side of the engine with cylinder number 1, and bank 2 referring to the opposite side.

OBDII Code P0021 2004 Nissan Maxima - Intake Valve Timing Control Performance Bank 2
P0021 2004 Nissan Maxima Code - Intake Valve Timing Control Performance Bank 2

Common Causes of P0021 2004 Nissan Maxima

  1. Faulty intake valve timing control solenoid
  2. Malfunctioning camshaft position sensor
  3. Timing chain or belt issues
  4. Engine computer system malfunction
  5. Electrical wiring or connection problems

Symptoms of P0021 2004 Nissan Maxima

  1. Reduced power and acceleration
  2. Decreased fuel efficiency
  3. Rough idling or stalling
  4. Engine misfires
  5. Illuminated check engine light

How to Fix P0021 2004 Nissan Maxima

  1. Diagnose the issue using a scan tool to confirm the P0021 code and identify the specific cause.
  2. Inspect the intake valve timing control solenoid, camshaft position sensor, and associated wiring for any signs of damage or wear.
  3. Replace any faulty components identified during the diagnostic process.
  4. Clear the code and test drive the vehicle to ensure the issue has been resolved.
  5. If necessary, perform a relearn procedure for the intake valve timing control system to recalibrate the timing.

Cost to Fix P0021 2004 Nissan Maxima

The typical repair costs for addressing the P0021 code on a 2004 Nissan Maxima can vary depending on the specific cause of the issue and the cost of parts and labor. In general, the cost of replacing a faulty intake valve timing control solenoid or camshaft position sensor can range from $200 to $500, including parts and labor. However, if the issue is more complex and involves additional components or diagnostics, the cost could be higher.

What does this mean?

Tech Notes for P0021 2004 Nissan Maxima

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 the engine oil and filter and reset the engine code. If the code comes back you can remove the Intake valve timing control solenoid and clean it with brake cleaner.



















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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 2004 Nissan Maxima Code

1. What are the common symptoms of OBDII code P0021 in a 2004 Nissan Maxima?

- Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and difficulty starting the vehicle.

2. What does the OBDII code P0021 "Intake Valve Timing Control Performance Bank 2" mean for a 2004 Nissan Maxima?

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

3. What are the possible causes of OBDII code P0021 in a 2004 Nissan Maxima?

- Possible causes include a faulty intake valve timing control solenoid, damaged timing chain or belt, low engine oil level, or issues with the camshaft or crankshaft sensors.

4. How can I diagnose the OBDII code P0021 in my 2004 Nissan Maxima?

- Diagnosing this code typically involves checking the condition of the timing components, inspecting the intake valve timing control solenoid, and testing the camshaft and crankshaft sensors.

5. Can I continue driving my 2004 Nissan Maxima with OBDII code P0021 present?

- It is not recommended to continue driving with this code active, as it can lead to further engine damage and potentially unsafe driving conditions.

6. How can I repair OBDII code P0021 in my 2004 Nissan Maxima?

- Repairing this code may involve replacing the intake valve timing control solenoid, addressing any issues with the timing components, and resetting the fault code with an OBDII scanner.

7. Is it possible to clear the OBDII code P0021 in a 2004 Nissan Maxima without fixing the underlying issue?

- While it is possible to clear the code temporarily, the underlying issue causing the code will need to be addressed to prevent it from reoccurring.

8. Will OBDII code P0021 cause permanent damage to the engine of a 2004 Nissan Maxima?

- If left unresolved, this code can potentially cause damage to the engine over time, especially if it leads to timing issues or other related problems.

9. How much does it typically cost to repair OBDII code P0021 in a 2004 Nissan Maxima?

- The cost of repairs for this code can vary depending on the specific issue causing it, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can a DIY enthusiast fix OBDII code P0021 in a 2004 Nissan Maxima?

- Depending on the DIY enthusiast's skill level and access to tools, some may be able to address simpler causes of this code, such as replacing the intake valve timing control solenoid. However, more complex issues may require professional assistance.

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