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Engine-Codes – Infiniti – P0021 2004 Infiniti I35

P0021 2004 Infiniti I35 Code - Intake Valve Timing Control Performance Bank 2

Quick Answer

The P0021 code on a 2004 Infiniti I35 indicates an issue with the Intake Valve Timing Control Performance on Bank 2. Common causes include Faulty Intake Valve Timing Control Solenoid, Dirty or clogged 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 2004 Infiniti I35 indicates Intake Valve Timing Control Performance Bank 2.
Common causes
Common causes include Faulty Intake Valve Timing Control Solenoid, Dirty or clogged 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 Sep 14, 2024
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Code P0021 2004 Infiniti I35 Description

The P0021 code on a 2004 Infiniti I35 indicates an issue with the Intake Valve Timing Control Performance on Bank 2. This means that there is a problem with the timing of the intake valves on the second bank of cylinders in the engine. The intake valve timing control system is responsible for adjusting the timing of the intake valves to optimize engine performance and fuel efficiency. When this system malfunctions, it can lead to poor engine performance, reduced fuel efficiency, and potential long-term damage if not addressed promptly.

OBDII Code P0021 2004 Infiniti I35 - Intake Valve Timing Control Performance Bank 2
P0021 2004 Infiniti I35 Code - Intake Valve Timing Control Performance Bank 2

Common Causes of P0021 2004 Infiniti I35

  1. Faulty Intake Valve Timing Control Solenoid
  2. Dirty or clogged oil passages
  3. Timing chain or belt issues
  4. Wiring or electrical issues
  5. Engine oil level or quality issues

Symptoms of P0021 2004 Infiniti I35

  1. Check Engine Light is illuminated
  2. Rough idling or stalling
  3. Decreased fuel efficiency
  4. Loss of power or acceleration
  5. Engine misfires

How to Fix P0021 2004 Infiniti I35

  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 for proper operation and replace if necessary.
  3. Check and clean oil passages to ensure proper oil flow to the timing control system.
  4. Inspect the timing chain or belt for wear or damage and replace if needed.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0021 2004 Infiniti I35

The cost of repairing the Intake Valve Timing Control Performance issue on a 2004 Infiniti I35 can vary depending on the specific cause of the problem. On average, the parts for this repair can range from $100 to $300, while the labor costs can range from $150 to $400. Overall, the total repair cost can be anywhere from $250 to $700. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, labor rates, and the extent of the repairs needed. It's recommended to consult with a certified mechanic or repair shop for a more accurate cost estimate.

What does this mean?

Tech Notes for P0021 2004 Infiniti I35

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 Infiniti I35 Code

1. What are the common symptoms of OBDII code P0021 on a 2004 Infiniti I35?

- Common symptoms of code P0021 include rough idling, reduced engine performance, engine misfires, and potentially stalling.

2. What does the OBDII code P0021 indicate in a 2004 Infiniti I35?

- OBDII code P0021 in a 2004 Infiniti I35 indicates an issue with the intake valve timing control performance on bank 2 of the engine.

3. What are the possible causes of OBDII code P0021 on a 2004 Infiniti I35?

- Possible causes of code P0021 can include a faulty intake valve timing control solenoid, oil flow issues to the control valve, incorrect oil viscosity, or a problem with the engine's timing chain.

4. How can I diagnose the cause of OBDII code P0021 on my 2004 Infiniti I35?

- Diagnosing code P0021 may involve checking the oil level and condition, inspecting the intake valve timing control solenoid, verifying oil flow to the control valve, and examining the engine's timing components.

5. Can I continue driving my 2004 Infiniti I35 with OBDII code P0021?

- It is not recommended to drive your vehicle with code P0021 as it can lead to further engine damage and potential safety hazards. Prompt diagnosis and repair are advised.

6. How can I repair OBDII code P0021 on my 2004 Infiniti I35?

- Repairing code P0021 may involve replacing the intake valve timing control solenoid, ensuring proper oil flow to the control valve, correcting any oil viscosity issues, or addressing timing chain problems.

7. Is it possible to reset OBDII code P0021 on a 2004 Infiniti I35 without fixing the underlying issue?

- Resetting the code without addressing the root cause is not recommended, as the issue will persist and could lead to more severe problems down the road.

8. Will OBDII code P0021 on a 2004 Infiniti I35 cause the check engine light to illuminate?

- Yes, code P0021 will trigger the check engine light to illuminate on your 2004 Infiniti I35 to alert you to the intake valve timing control performance issue.

9. Can a DIY enthusiast repair OBDII code P0021 on a 2004 Infiniti I35?

- Depending on the DIYer's skill level and access to tools, repairing code P0021 may be possible. However, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

10. How much does it typically cost to fix OBDII code P0021 on a 2004 Infiniti I35?

- The cost of fixing code P0021 can vary depending on the specific cause of the issue and labor rates in your area. It's best to obtain quotes from local mechanics or repair shops for an accurate estimate.

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