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Engine-Codes – Infiniti – P0021 2004 Infiniti G35

P0021 2004 Infiniti G35 Code - Intake Valve Timing Control Performance Bank 2

Quick Answer

The OBD-II code P0021 in a 2004 Infiniti G35 indicates a problem related to the intake valve timing control performance on bank 2 of the engine. Common causes include Faulty intake valve timing control solenoid, Malfunctioning camshaft position sensor, Timing belt or chain 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 G35 indicates Intake Valve Timing Control Performance Bank 2.
Common causes
Common causes include Faulty intake valve timing control solenoid, Malfunctioning camshaft position sensor, Timing belt or chain 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 10, 2024
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Code P0021 2004 Infiniti G35 Description

The OBD-II code P0021 in a 2004 Infiniti G35 indicates a problem related to the intake valve timing control performance on bank 2 of the engine. This code specifically points to issues with the intake camshaft timing on the side of the engine that houses cylinder number 2. The intake valve timing control system is crucial for regulating the timing of the opening and closing of the intake valves, which directly impacts the engine's performance, fuel efficiency, and emissions.

OBDII Code P0021 2004 Infiniti G35 - Intake Valve Timing Control Performance Bank 2
P0021 2004 Infiniti G35 Code - Intake Valve Timing Control Performance Bank 2

Common Causes of P0021 2004 Infiniti G35

  1. Faulty intake valve timing control solenoid
  2. Malfunctioning camshaft position sensor
  3. Timing belt or chain issues
  4. Low engine oil levels or poor oil quality
  5. Electrical wiring or connector problems

Symptoms of P0021 2004 Infiniti G35

  1. Decreased engine performance and power
  2. Rough idling or engine misfires
  3. Poor fuel economy
  4. Engine stalling or difficulty starting
  5. Check engine light illuminated on the dashboard

How to Fix P0021 2004 Infiniti G35

  1. Diagnose the exact cause of the issue using a scan tool to pinpoint the specific component causing the fault code.
  2. Replace the faulty intake valve timing control solenoid or camshaft position sensor, if necessary.
  3. Inspect and potentially replace the timing belt or chain if there are signs of wear or damage.
  4. Check and replenish engine oil levels and ensure the oil quality meets the manufacturer's specifications.
  5. Clear the fault code from the vehicle's computer system and perform a test drive to ensure the issue is resolved.

Cost to Fix P0021 2004 Infiniti G35

The cost to repair the intake valve timing control performance issue on a 2004 Infiniti G35 can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay between $200 to $800 for parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can fluctuate, so it's advisable to obtain quotes from multiple shops to ensure a fair price. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.

What does this mean?

Tech Notes for P0021 2004 Infiniti G35

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 G35 Code

1. What are the common symptoms of OBDII code P0021 on a 2004 Infiniti G35?

The common symptoms of code P0021 on a 2004 Infiniti G35 include rough idling, engine stalling, decreased fuel efficiency, and lack of power.

2. What does the OBDII code P0021 Intake Valve Timing Control Performance Bank 2 mean?

Code P0021 indicates that there is a performance issue with the intake valve timing control on Bank 2 of the engine in a 2004 Infiniti G35.

3. What are the possible causes of OBDII code P0021 on a 2004 Infiniti G35?

Possible causes of code P0021 on a 2004 Infiniti G35 include a faulty intake valve timing control solenoid, dirty engine oil, engine oil viscosity issues, or a problem with the timing chain.

4. How can I diagnose the OBDII code P0021 on my 2004 Infiniti G35?

Diagnosing code P0021 involves using a scan tool to retrieve the code, checking the intake valve timing control solenoid, inspecting the engine oil quality and level, and examining the timing chain for any issues.

5. Can I continue driving my 2004 Infiniti G35 with OBDII code P0021?

It is not recommended to drive your vehicle with code P0021, as it can lead to further engine damage and performance issues. It's best to address the problem promptly.

6. How serious is OBDII code P0021 on a 2004 Infiniti G35?

Code P0021 should be taken seriously, as it can affect the engine's performance and potentially cause damage if left unresolved. It is important to address the underlying issue promptly.

7. How much does it typically cost to repair OBDII code P0021 on a 2004 Infiniti G35?

The cost to repair code P0021 on a 2004 Infiniti G35 can vary depending on the exact cause of the issue. It is recommended to consult a mechanic for an accurate diagnosis and cost estimate.

8. Can I reset the OBDII code P0021 on my 2004 Infiniti G35 without fixing the underlying issue?

Resetting the code without addressing the underlying problem will only temporarily clear the error code. The issue will likely resurface, so it is important to diagnose and repair the root cause.

9. Is it possible to prevent OBDII code P0021 from occurring on a 2004 Infiniti G35?

Regular maintenance, including timely oil changes and using the recommended engine oil, can help prevent issues like code P0021. It's also crucial to address any engine performance problems promptly.

10. Can a DIY enthusiast fix OBDII code P0021 on a 2004 Infiniti G35?

While some DIY enthusiasts may have the skills to address code P0021, it is a complex issue that may require specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

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