Engine-Codes.com
Engine-Codes – Nissan – P0304 2010 Nissan Sentra

P0304 2010 Nissan Sentra Code - Number 4 Cylinder Misfire Detected

Quick Answer

The diagnostic trouble code P0304 for a 2010 Nissan Sentra 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 fuel injector in 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 2010 Nissan Sentra 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 fuel injector in 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 13, 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 2010 Nissan Sentra Description

The diagnostic trouble code P0304 for a 2010 Nissan Sentra indicates that a misfire has been detected in the number 4 cylinder of the engine. This means that the fuel-air mixture in the cylinder is not igniting properly, leading to a loss of power, rough idling, and potential damage to the catalytic converter. A misfire can be caused by a variety of issues, including problems with the ignition system, fuel system, or engine mechanical components.

OBDII Code P0304 2010 Nissan Sentra - Number 4 Cylinder Misfire Detected
P0304 2010 Nissan Sentra Code - Number 4 Cylinder Misfire Detected

Common Causes of P0304 2010 Nissan Sentra

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

Symptoms of P0304 2010 Nissan Sentra

  1. Loss of power
  2. Rough idling
  3. Hesitation during acceleration
  4. Increased fuel consumption
  5. Increased emissions

How to Fix P0304 2010 Nissan Sentra

  1. Diagnose the specific cause of the misfire by performing a thorough inspection of the ignition system, fuel system, and engine mechanical components.
  2. Replace the spark plug in the number 4 cylinder if it is found to be faulty.
  3. Test and potentially replace the ignition coil in the number 4 cylinder if it is failing.
  4. Clean or replace the fuel injector in the number 4 cylinder if it is clogged.
  5. Check for and repair any vacuum leaks that may be affecting the number 4 cylinder.

Cost to Fix P0304 2010 Nissan Sentra

The typical repair costs for addressing a misfire in the number 4 cylinder of a 2010 Nissan Sentra can vary depending on the specific cause of the issue. In general, the cost of replacing a spark plug or ignition coil can range from $50 to $200 per part, while cleaning or replacing a fuel injector can cost between $50 and $300. The total repair cost, including parts and labor, can range from $150 to $600. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P0304 2010 Nissan Sentra

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 2010 Nissan Sentra code?

Need more information on how to fix the P0304 2010 Nissan Sentra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0304 2010 Nissan Sentra 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 2010 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0304 in a 2010 Nissan Sentra?

- Common symptoms include engine misfiring, rough idling, loss of power, and possible hesitation during acceleration.

2. What could cause the Number 4 cylinder misfire detected in a 2010 Nissan Sentra?

- Potential causes of the P0304 code include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, or issues with the engine's compression.

3. How can I diagnose the Number 4 cylinder misfire in my 2010 Nissan Sentra?

- Diagnose P0304 by checking the spark plugs, inspecting the ignition coils, testing the fuel injectors, scanning for vacuum leaks, and performing a compression test on the engine.

4. Can a dirty air filter trigger the P0304 code in a 2010 Nissan Sentra?

- While a dirty air filter itself may not directly cause the P0304 code, it can contribute to an imbalance in the air-fuel mixture, potentially leading to a cylinder misfire.

5. Is it safe to drive my 2010 Nissan Sentra with the P0304 code active?

- It is not recommended to drive with a misfire as it can cause damage to the catalytic converter and other components. It's best to address the issue promptly.

6. How much does it typically cost to repair the Number 4 cylinder misfire in a 2010 Nissan Sentra?

- The cost of repairing the P0304 code can vary depending on the root cause, but it may range from $100 to $500 or more, including parts and labor.

7. Can I reset the OBDII code P0304 in my 2010 Nissan Sentra without fixing the underlying issue?

- Resetting the code without fixing the underlying problem will only temporarily turn off the check engine light. The issue will likely resurface if not properly addressed.

8. Are there any preventive maintenance tips to avoid the Number 4 cylinder misfire in my 2010 Nissan Sentra?

- Regular maintenance such as changing spark plugs, inspecting ignition components, keeping the air filter clean, and using quality fuel can help prevent cylinder misfires.

9. Will driving with the P0304 code on damage my 2010 Nissan Sentra's engine?

- Continuing to drive with a misfire can potentially cause damage to the engine, including the catalytic converter. It's best to address the issue promptly.

10. How long does it typically take to repair the Number 4 cylinder misfire in a 2010 Nissan Sentra?

- The repair time for a P0304 code can vary based on the specific cause. It may take anywhere from 1-3 hours for diagnosis and repair, depending on the complexity of the issue.

Discuss the causes and fixes for P0304 2010 Nissan Sentra OBDII Code

Submit a New Comment

Code P0304 2010 Nissan Sentra comments

No comments found for this page.