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P0303 2010 Nissan Pathfinder Code - Number 3 Cylinder Misfire Detected

Quick Answer

The diagnostic trouble code P0303 for a 2010 Nissan Pathfinder indicates that a misfire has been detected in the number 3 cylinder of the engine. Common causes include Faulty spark plug in the number 3 cylinder, Failing ignition coil for the number 3 cylinder, Clogged or malfunctioning fuel injector for the number 3 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
P0303 2010 Nissan Pathfinder indicates Number 3 Cylinder Misfire Detected.
Common causes
Common causes include Faulty spark plug in the number 3 cylinder, Failing ignition coil for the number 3 cylinder, Clogged or malfunctioning fuel injector for the number 3 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
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Code P0303 2010 Nissan Pathfinder Description

The diagnostic trouble code P0303 for a 2010 Nissan Pathfinder indicates that a misfire has been detected in the number 3 cylinder of the engine. This means that the fuel-air mixture in the cylinder is not igniting properly, leading to a loss of power and efficiency. A misfire can cause rough idling, hesitation during acceleration, decreased fuel efficiency, and potentially even engine damage if left unresolved.

OBDII Code P0303 2010 Nissan Pathfinder - Number 3 Cylinder Misfire Detected
P0303 2010 Nissan Pathfinder Code - Number 3 Cylinder Misfire Detected

Common Causes of P0303 2010 Nissan Pathfinder

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

Symptoms of P0303 2010 Nissan Pathfinder

  1. Rough idling
  2. Hesitation or stumbling during acceleration
  3. Loss of power
  4. Increased fuel consumption
  5. Illumination of the check engine light

How to Fix P0303 2010 Nissan Pathfinder

  1. Begin by diagnosing the specific cause of the misfire in the number 3 cylinder using a scan tool to pinpoint the issue.
  2. Replace the spark plug in the number 3 cylinder if it is found to be faulty.
  3. Test and potentially replace the ignition coil for the number 3 cylinder if necessary.
  4. Inspect and clean or replace the fuel injector for the number 3 cylinder to ensure proper fuel delivery.
  5. Check for vacuum leaks in the intake system and repair as needed to prevent air leaks affecting the number 3 cylinder.

Cost to Fix P0303 2010 Nissan Pathfinder

The cost of repairing a misfire in the number 3 cylinder of a 2010 Nissan Pathfinder 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 between $150 and $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to get a few quotes from different shops to find the best price for your repair.

What does this mean?

Tech Notes for P0303 2010 Nissan Pathfinder

The P0303 code means that cylinder #3 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 #3. 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 P0303 2010 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P0303 in a 2010 Nissan Pathfinder?

- Common symptoms of a number 3 cylinder misfire detected include rough idling, loss of power, engine vibration, and potential stalling.

2. What are the possible causes of a number 3 cylinder misfire in a 2010 Nissan Pathfinder?

- The misfire can be caused by issues such as a faulty spark plug, ignition coil, fuel injector, vacuum leak, or low compression in the cylinder.

3. How can I diagnose the source of the misfire in the number 3 cylinder of my 2010 Nissan Pathfinder?

- To pinpoint the issue, perform a thorough inspection of the spark plugs, ignition coils, fuel injectors, and check for vacuum leaks or compression issues using a diagnostic tool.

4. Can a dirty or clogged fuel injector cause OBDII code P0303 in a 2010 Nissan Pathfinder?

- Yes, a dirty or clogged fuel injector can disrupt the fuel-air mixture in the number 3 cylinder, leading to a misfire and triggering the P0303 code.

5. Is it safe to drive my 2010 Nissan Pathfinder with OBDII code P0303 indicating a number 3 cylinder misfire?

- It is not recommended to drive the vehicle with a cylinder misfire as it can cause further damage to the engine and catalytic converter. Immediate attention and repair are advised.

6. How important is it to address OBDII code P0303 in a 2010 Nissan Pathfinder promptly?

- It is crucial to address the number 3 cylinder misfire promptly as ignoring it can lead to decreased fuel efficiency, engine damage, and potential safety hazards.

7. Can a DIY enthusiast repair OBDII code P0303 in a 2010 Nissan Pathfinder?

- Depending on the skill level, DIY enthusiasts can attempt to address the misfire by replacing spark plugs, ignition coils, or performing basic diagnostics. However, complex issues may require professional assistance.

8. Will resetting the OBDII system clear the P0303 code in a 2010 Nissan Pathfinder?

- Resetting the OBDII system may temporarily clear the code, but it will reappear if the underlying issue causing the number 3 cylinder misfire is not resolved.

9. How much can I expect to pay for a professional repair of OBDII code P0303 in a 2010 Nissan Pathfinder?

- The cost of professional repair for a number 3 cylinder misfire can vary depending on the exact cause of the issue, but it typically ranges from $100 to $500 or more, including parts and labor.

10. Can a failing ignition coil be a common culprit behind OBDII code P0303 in a 2010 Nissan Pathfinder?

- Yes, a failing ignition coil is a common culprit for a number 3 cylinder misfire detected in a 2010 Nissan Pathfinder, and replacing the faulty coil can often resolve the issue.

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