Engine-Codes.com
Engine-Codes – Nissan – P0304 2005 Nissan Maxima

P0304 2005 Nissan Maxima Code - Number 4 Cylinder Misfire Detected

Quick Answer

When a diagnostic trouble code P0304 appears on a 2005 Nissan Maxima, it indicates that a misfire has been detected in the number 4 cylinder of the engine. Common causes include Faulty spark plug in the number 4 cylinder, Failing ignition coil in the number 4 cylinder, Clogged or malfunctioning fuel injector for the number 4 cylinder. 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 2005 Nissan Maxima indicates Number 4 Cylinder Misfire Detected.
Common causes
Common causes include Faulty spark plug in the number 4 cylinder, Failing ignition coil in the number 4 cylinder, Clogged or malfunctioning fuel injector for the number 4 cylinder.
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
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0304 2005 Nissan Maxima Description

When a diagnostic trouble code P0304 appears on a 2005 Nissan Maxima, it indicates that a misfire has been detected in the number 4 cylinder of the engine. This misfire can lead to a variety of issues, including rough idling, decreased fuel efficiency, loss of power, and potentially even engine damage if left unaddressed.

OBDII Code P0304 2005 Nissan Maxima - Number 4 Cylinder Misfire Detected
P0304 2005 Nissan Maxima Code - Number 4 Cylinder Misfire Detected

Common Causes of P0304 2005 Nissan Maxima

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

Symptoms of P0304 2005 Nissan Maxima

  1. Rough idling or vibrations when the vehicle is running
  2. Loss of power or hesitation during acceleration
  3. Decreased fuel efficiency
  4. Engine misfires or backfires
  5. Illumination of the check engine light

How to Fix P0304 2005 Nissan Maxima

  1. Perform a diagnostic scan to confirm the presence of code P0304 and identify the specific cylinder misfire.
  2. Inspect the spark plug, ignition coil, and fuel injector in the number 4 cylinder for any signs of damage or wear.
  3. Test the compression levels in the number 4 cylinder to ensure they are within the manufacturer's specifications.
  4. Replace any faulty components identified during the inspection, such as a damaged spark plug, failing ignition coil, or clogged fuel injector.
  5. Clear the diagnostic trouble code and test drive the vehicle to ensure the misfire has been resolved.

Cost to Fix P0304 2005 Nissan Maxima

The cost of repairing a number 4 cylinder misfire on a 2005 Nissan Maxima can vary depending on the specific cause of the issue and the labor rates in your area. In general, you can expect to pay anywhere from $100 to $500 for parts and labor to address this problem. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's best to get a personalized estimate from a qualified technician. Additionally, 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 P0304 2005 Nissan Maxima

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.

Need more information about the P0304 2005 Nissan Maxima code?

Need more information on how to fix the P0304 2005 Nissan Maxima code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0304 2005 Nissan Maxima code diagnosed by a professional: Find a repair shop in your area

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 2005 Nissan Maxima Code

1. What are common symptoms of OBDII code P0304 on a 2005 Nissan Maxima?

- Common symptoms include rough idling, loss of power, engine vibration, and a noticeable decrease in fuel efficiency.

2. What can cause a Number 4 cylinder misfire in a 2005 Nissan Maxima?

- Possible causes of a P0304 code include faulty spark plugs, a malfunctioning ignition coil, vacuum leaks, or issues with the fuel injector.

3. How can I diagnose the source of the misfire on the Number 4 cylinder of my 2005 Nissan Maxima?

- Diagnose the issue by checking the spark plug and ignition coil for signs of wear or damage, inspecting for vacuum leaks, and performing a compression test on the cylinder.

4. Can a dirty fuel injector cause a P0304 code on a 2005 Nissan Maxima?

- 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.

5. What is the recommended repair for a Number 4 cylinder misfire on a 2005 Nissan Maxima?

- The recommended repair may involve replacing the spark plugs, ignition coil, fuel injector, or addressing any vacuum leaks to resolve the misfire issue.

6. Can driving with a P0304 code on a 2005 Nissan Maxima cause further damage to the engine?

- Continuing to drive with a misfire can potentially cause damage to the catalytic converter and other engine components, leading to more costly repairs down the line.

7. How can I reset the OBDII code P0304 on my 2005 Nissan Maxima after making repairs?

- You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the error code from the system.

8. Are there any preventive maintenance tips to avoid a Number 4 cylinder misfire in a 2005 Nissan Maxima?

- Regularly scheduled maintenance, such as changing spark plugs and inspecting ignition components, can help prevent misfire issues and keep the engine running smoothly.

9. Is it safe to drive my 2005 Nissan Maxima with a flashing check engine light due to a P0304 code?

- A flashing check engine light indicates a severe misfire that can cause damage to the catalytic converter. It is recommended to avoid driving the vehicle and address the issue promptly.

10. How long does it take to repair a Number 4 cylinder misfire on a 2005 Nissan Maxima?

- The repair time can vary depending on the exact cause of the misfire, but it may take anywhere from a few hours to a full day to diagnose and fix the issue properly.

Discuss the causes and fixes for P0304 2005 Nissan Maxima OBDII Code

Submit a New Comment

Code P0304 2005 Nissan Maxima comments

No comments found for this page.