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P0301 2005 Infiniti G35 Code - Number 1 Cylinder Misfire Detected

Quick Answer

When the OBD-II code P0301 appears on a 2005 Infiniti G35, it indicates that a misfire has been detected in the number 1 cylinder of the engine. Common causes include Faulty spark plug in the number 1 cylinder, Failing ignition coil for the number 1 cylinder, Clogged or malfunctioning fuel injector for the number 1 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
P0301 2005 Infiniti G35 indicates Number 1 Cylinder Misfire Detected.
Common causes
Common causes include Faulty spark plug in the number 1 cylinder, Failing ignition coil for the number 1 cylinder, Clogged or malfunctioning fuel injector for the number 1 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 P0301 2005 Infiniti G35 Description

When the OBD-II code P0301 appears on a 2005 Infiniti G35, it indicates that a misfire has been detected in the number 1 cylinder of the engine. This means that the fuel-air mixture in the cylinder is not igniting properly, leading to a disruption in the combustion process. This can result in a rough idle, loss of power, decreased fuel efficiency, and potentially even engine damage if left unresolved.

OBDII Code P0301 2005 Infiniti G35 - Number 1 Cylinder Misfire Detected
P0301 2005 Infiniti G35 Code - Number 1 Cylinder Misfire Detected

Common Causes of P0301 2005 Infiniti G35

  1. Faulty spark plug in the number 1 cylinder.
  2. Failing ignition coil for the number 1 cylinder.
  3. Clogged or malfunctioning fuel injector for the number 1 cylinder.
  4. Vacuum leak in the intake manifold affecting the number 1 cylinder.
  5. Engine mechanical issues such as low compression in the number 1 cylinder.

Symptoms of P0301 2005 Infiniti G35

  1. Rough idle or vibrations felt while the engine is running.
  2. Loss of power or acceleration, especially when driving at higher speeds.
  3. Engine misfires or hesitation during acceleration.
  4. Increased fuel consumption or a noticeable decrease in fuel efficiency.
  5. Check Engine Light illuminated on the dashboard.

How to Fix P0301 2005 Infiniti G35

  1. Begin by diagnosing the specific cause of the misfire, such as testing the spark plug, ignition coil, fuel injector, and compression in the number 1 cylinder.
  2. Replace the faulty component causing the misfire, whether it be the spark plug, ignition coil, fuel injector, or addressing any vacuum leaks.
  3. Clear the OBD-II code and reset the Check Engine Light.
  4. Test drive the vehicle to ensure the misfire has been resolved and that the engine is running smoothly.
  5. Perform a follow-up inspection after a few days of driving to confirm that the issue has been fully resolved.

Cost to Fix P0301 2005 Infiniti G35

The cost of repairing a misfire in the number 1 cylinder of a 2005 Infiniti G35 can vary depending on the specific cause of the issue. On average, the cost of parts such as spark plugs, ignition coils, or fuel injectors can range from $50 to $200 per component. Labor costs at an auto repair shop can range from $80 to $150 per hour, with the total repair bill likely falling between $150 to $500, depending on the extent of the repairs needed. It's important to note that prices can vary based on location, the shop's labor rates, and the quality of parts used.

What does this mean?

Tech Notes for P0301 2005 Infiniti G35

The P0301 code means that the cylinder 1 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 1. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes"

When is the Code Detected?

Engine Cylinder 1 is misfiring.

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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 P0301 2005 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0301 on a 2005 Infiniti G35?

- Common symptoms include engine misfires, rough idling, loss of power, and potential fuel odor.

2. What are the possible causes of a number 1 cylinder misfire in a 2005 Infiniti G35?

- 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 cause of a number 1 cylinder misfire in my 2005 Infiniti G35?

- Diagnose by checking the spark plug, ignition coil, fuel injector, and performing a compression test to pinpoint the exact cause.

4. Are there any DIY repair tips for addressing OBDII code P0301 on a 2005 Infiniti G35?

- DIY repair tips include checking and replacing the spark plug, ignition coil, or fuel injector in the number 1 cylinder, as well as inspecting for vacuum leaks.

5. Can driving with a misfiring number 1 cylinder in a 2005 Infiniti G35 cause further damage?

- Yes, driving with a misfire can potentially damage the catalytic converter and other engine components over time.

6. How important is it to address OBDII code P0301 promptly in a 2005 Infiniti G35?

- It is crucial to address the misfire promptly to prevent further damage to the engine and ensure optimal performance and fuel efficiency.

7. Is it safe to continue driving a 2005 Infiniti G35 with a number 1 cylinder misfire?

- It is not recommended to drive the vehicle with a misfire as it can lead to more severe issues and potential breakdowns.

8. Can a bad fuel injector cause OBDII code P0301 in a 2005 Infiniti G35?

- Yes, a faulty fuel injector in the number 1 cylinder can cause misfires and trigger OBDII code P0301.

9. How much does it typically cost to repair a number 1 cylinder misfire on a 2005 Infiniti G35?

- The cost of repairs can vary depending on the exact cause of the misfire, but it may range from a few hundred to over a thousand dollars.

10. Will resetting the OBDII code P0301 in a 2005 Infiniti G35 make the issue go away?

- Resetting the code without addressing the underlying cause of the misfire will not fix the issue, and the code is likely to reappear.

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