AutoCodes – Infiniti – P0304 2006 Infiniti G35

P0304 2006 Infiniti G35 Code - Number 4 Cylinder Misfire Detected

Quick Answer

When a misfire occurs, engine speed will fluctuate. Common causes include Faulty Spark Plug #4, Clogged or faulty Fuel Injector #4, Faulty Ignition Coil #4. 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 #4, Clogged or faulty Fuel Injector #4, Faulty Ignition Coil #4.
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.

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Code Popularity 6,517

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 29, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0304 2006 Infiniti G35 Description

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring. The Diagnostic Trouble Code (DTC) will be set when the Engine Control Module monitors the crankshaft speed and has detected that engine cylinder #4 is misfiring.

OBDII Code P0304 2006 Infiniti G35 - Number 4 Cylinder Misfire Detected - AutoCodes.com — P0304 2006 Infiniti G35 Code - Number 4 Cylinder Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0304 2006 Infiniti G35?

Faulty Spark Plug #4
Clogged or faulty Fuel Injector #4
Faulty Ignition Coil #4
Fuel Injector #4 harness is open or shorted
Fuel Injector #4 circuit poor electrical connection
Ignition Coil #4 harness is open or shorted
Ignition Coil #4 circuit poor electrical connection
Insufficient cylinder 4 compression
Incorrect fuel pressure
Intake air leak

How to Fix the DTC P0304 2006 Infiniti G35?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0304 2006 Infiniti G35 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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.