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P0304 2010 Nissan Pathfinder Code - Number 4 Cylinder Misfire Detected

Quick Answer

When a diagnostic trouble code P0304 is triggered in a 2010 Nissan Pathfinder, it indicates that a misfire has been detected in the number 4 cylinder of the engine. Common causes include Faulty spark plug, Failing ignition coil, Clogged 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 2010 Nissan Pathfinder indicates Number 4 Cylinder Misfire Detected.
Common causes
Common causes include Faulty spark plug, Failing ignition coil, Clogged 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 11, 2024
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Code P0304 2010 Nissan Pathfinder Description

When a diagnostic trouble code P0304 is triggered in a 2010 Nissan Pathfinder, 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 that can affect the vehicle's performance and overall drivability.

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

Common Causes of P0304 2010 Nissan Pathfinder

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

Symptoms of P0304 2010 Nissan Pathfinder

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

How to Fix P0304 2010 Nissan Pathfinder

  1. Diagnose the specific cause of the misfire by performing a thorough inspection of the spark plugs, ignition coils, fuel injectors, and vacuum lines.
  2. Replace the faulty spark plug or ignition coil in the number 4 cylinder.
  3. Clean or replace clogged fuel injectors.
  4. Repair any vacuum leaks that may be contributing to the misfire.
  5. Perform a compression test to check for any internal engine issues causing the misfire.

Cost to Fix P0304 2010 Nissan Pathfinder

The cost of repairing a misfire in the number 4 cylinder of a 2010 Nissan Pathfinder can vary depending on the specific cause of the issue. On average, the cost of parts for this repair could range from $50 to $200, with labor costs adding an additional $100 to $300. However, it's important to note that labor rates at auto repair shops can vary widely, so it's recommended to check with local shops for a more accurate estimate.

What does this mean?

Tech Notes for P0304 2010 Nissan Pathfinder

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 2010 Nissan Pathfinder Code

1. What does the OBDII code P0304 mean in a 2010 Nissan Pathfinder?

P0304 indicates a misfire has been detected in cylinder number 4, meaning that cylinder isn’t firing properly.

2. What are the common symptoms of a P0304 code in a Nissan Pathfinder?

Symptoms can include rough idling, reduced engine power, poor fuel economy, difficulty starting, or the Check Engine Light turning on.

3. What causes the P0304 code on a 2010 Nissan Pathfinder?

Common causes include a faulty spark plug, a bad ignition coil, clogged fuel injectors, vacuum leaks, or low cylinder compression in cylinder 4.

4. Can a dirty fuel injector cause the P0304 code?

Yes, a clogged or malfunctioning fuel injector can disrupt fuel delivery, leading to a misfire in cylinder 4.

5. Should I replace all the spark plugs if I get the P0304 code?

If the spark plugs are old, it’s a good idea to replace all of them to ensure consistent performance, even if only cylinder 4 is misfiring.

6. How serious is the P0304 code on a 2010 Nissan Pathfinder?

P0304 is moderately serious. Driving with a misfire can damage the catalytic converter or other engine components over time.

7. Can a bad ignition coil trigger the P0304 code?

Yes, a failing ignition coil can cause insufficient spark, leading to a misfire in cylinder 4.

8. How do I fix the P0304 code on my Nissan Pathfinder?

Inspect and replace the spark plug, ignition coil, or fuel injector for cylinder 4. Check for vacuum leaks or test cylinder compression if the issue persists.

9. What tools do I need to diagnose the P0304 code?

You’ll need an OBDII scanner, a spark plug tester, a multimeter to test ignition coils, and possibly a compression tester.

10. Can I drive my Nissan Pathfinder with a P0304 code?

While you can drive it short-term, it’s not recommended. Prolonged driving with a misfire can cause further engine damage or increase repair costs.

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