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P0304 2006 Infiniti G35 Code - Number 4 Cylinder Misfire Detected

Quick Answer

When the diagnostic trouble code P0304 appears on a 2006 Infiniti G35, it indicates that a misfire has been detected in the number 4 cylinder of the engine. Common causes include Faulty spark plug in cylinder 4, Failing ignition coil, Clogged or malfunctioning fuel injector. 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
P0304 2006 Infiniti G35 indicates Number 4 Cylinder Misfire Detected.
Common causes
Common causes include Faulty spark plug in cylinder 4, Failing ignition coil, Clogged or malfunctioning fuel injector.
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 P0304 2006 Infiniti G35 Description

When the diagnostic trouble code P0304 appears on a 2006 Infiniti G35, it indicates that a misfire has been detected in the number 4 cylinder of the engine. This misfire can lead to a range of issues affecting the vehicle's performance, fuel efficiency, and emissions. A misfire occurs when the air-fuel mixture in the cylinder fails to ignite at the right time, causing a disruption in the combustion process. This can result in rough idling, decreased power, poor acceleration, and potentially even engine stalling.

OBDII Code P0304 2006 Infiniti G35 - Number 4 Cylinder Misfire Detected
P0304 2006 Infiniti G35 Code - Number 4 Cylinder Misfire Detected

Common Causes of P0304 2006 Infiniti G35

  1. Faulty spark plug in cylinder 4
  2. Failing ignition coil
  3. Clogged or malfunctioning fuel injector
  4. Vacuum leak in the intake manifold
  5. Low compression in the number 4 cylinder

Symptoms of P0304 2006 Infiniti G35

  1. Rough idling
  2. Loss of power
  3. Engine vibration
  4. Decreased fuel efficiency
  5. Check engine light illuminated

How to Fix P0304 2006 Infiniti G35

  1. Begin by diagnosing the specific cause of the misfire, such as testing the spark plug, ignition coil, fuel injector, and compression in cylinder 4.
  2. Replace the faulty spark plug in cylinder 4 if it is found to be the cause of the misfire.
  3. Test and potentially replace the ignition coil if it is failing to provide a strong spark to the cylinder.
  4. Clean or replace the fuel injector in cylinder 4 if it is clogged or malfunctioning.
  5. Check for and repair any vacuum leaks in the intake manifold that may be causing the misfire.

Cost to Fix P0304 2006 Infiniti G35

The cost of repairing a misfire in the number 4 cylinder of a 2006 Infiniti G35 can vary depending on the specific cause of the issue and the cost of parts and labor in your area. On average, you can expect to pay anywhere from $100 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's advisable to obtain quotes from multiple shops to ensure you're getting a fair price.

What does this mean?

Tech Notes for P0304 2006 Infiniti G35

The P0304 code means that cylinder #4 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder #4. If the problem persists more tests need to be done to diagnose the problem. See "Possible Causes" for the most common problems.

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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 P0304 2006 Infiniti G35 Code

1. What are common symptoms of OBDII code P0304 in a 2006 Infiniti G35?

- Common symptoms include engine misfires, rough idle, loss of power, and potentially increased fuel consumption.

2. What are the possible causes of a number 4 cylinder misfire in a 2006 Infiniti G35?

- Possible causes include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, low compression, or issues with the engine control module.

3. How can I diagnose the cause of a number 4 cylinder misfire in my 2006 Infiniti G35?

- Diagnose by checking spark plugs, ignition coils, fuel injectors, vacuum lines, compression levels, and using an OBDII scanner to pinpoint the specific issue.

4. Can driving with OBDII code P0304 in a 2006 Infiniti G35 cause further damage?

- Continuing to drive with a misfiring cylinder can potentially damage the catalytic converter and other components over time, so it's best to address the issue promptly.

5. How can I repair a number 4 cylinder misfire in a 2006 Infiniti G35?

- Repair options may include replacing spark plugs, ignition coils, fuel injectors, fixing vacuum leaks, addressing compression issues, or reprogramming the engine control module.

6. Is it safe to continue driving my 2006 Infiniti G35 with OBDII code P0304?

- It is not recommended to drive the vehicle with a misfiring cylinder as it can lead to further damage and potentially unsafe driving conditions.

7. Can a dirty or clogged fuel injector cause OBDII code P0304 in a 2006 Infiniti G35?

- Yes, a dirty or clogged fuel injector can disrupt the fuel delivery to the number 4 cylinder, leading to a misfire and triggering the OBDII code P0304.

8. How often should spark plugs be replaced in a 2006 Infiniti G35 to prevent cylinder misfires?

- Spark plugs should typically be replaced every 30,000 to 100,000 miles, but it's advisable to follow the manufacturer's recommendations for your specific vehicle.

9. Will resetting the OBDII code P0304 in a 2006 Infiniti G35 make the issue go away?

- Simply resetting the code will not fix the underlying issue causing the misfire. It's important to diagnose and address the root cause of the problem for a lasting solution.

10. Can a faulty engine control module (ECM) trigger OBDII code P0304 in a 2006 Infiniti G35?

- Yes, a malfunctioning ECM can potentially disrupt the proper functioning of the engine, leading to misfires in specific cylinders like the number 4 cylinder.

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