Engine-Codes.com
Engine-Codes – Infiniti – P0302 2005 Infiniti G35

P0302 2005 Infiniti G35 Code - Number 2 Cylinder Misfire Detected

Quick Answer

When a vehicle's onboard computer detects a misfire in the number 2 cylinder, it triggers the diagnostic trouble code (DTC) P0302. Common causes include Faulty ignition system components such as spark plugs, ignition coils, or spark plug wires, Fuel delivery issues, such as a clogged fuel injector or fuel filter, Vacuum leaks in the intake manifold or vacuum lines. 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
P0302 2005 Infiniti G35 indicates Number 2 Cylinder Misfire Detected.
Common causes
Common causes include Faulty ignition system components such as spark plugs, ignition coils, or spark plug wires, Fuel delivery issues, such as a clogged fuel injector or fuel filter, Vacuum leaks in the intake manifold or vacuum lines.
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 P0302 2005 Infiniti G35 Description

When a vehicle's onboard computer detects a misfire in the number 2 cylinder, it triggers the diagnostic trouble code (DTC) P0302. This code indicates that the engine is not firing properly in the specific cylinder, leading to a lack of power, rough idling, and potential damage to the catalytic converter over time. The misfire can be caused by a variety of issues, including ignition system problems, fuel delivery issues, vacuum leaks, or mechanical engine problems.

OBDII Code P0302 2005 Infiniti G35 - Number 2 Cylinder Misfire Detected
P0302 2005 Infiniti G35 Code - Number 2 Cylinder Misfire Detected

Common Causes of P0302 2005 Infiniti G35

  1. Faulty ignition system components such as spark plugs, ignition coils, or spark plug wires.
  2. Fuel delivery issues, such as a clogged fuel injector or fuel filter.
  3. Vacuum leaks in the intake manifold or vacuum lines.
  4. Mechanical problems in the engine, such as low compression or a leaking head gasket.
  5. Engine timing issues, such as a worn timing belt or chain.

Symptoms of P0302 2005 Infiniti G35

  1. Rough idling: The engine may shake or vibrate excessively while idling.
  2. Loss of power: The vehicle may struggle to accelerate or maintain speed.
  3. Increased fuel consumption: A misfiring cylinder can lead to poor fuel efficiency.
  4. Engine hesitation: The vehicle may hesitate or stumble during acceleration.
  5. Check Engine Light: The Check Engine Light may illuminate on the dashboard.

How to Fix P0302 2005 Infiniti G35

  1. Diagnose the specific cause of the misfire by performing a thorough inspection of the ignition system, fuel system, and engine components.
  2. Replace faulty ignition components, such as spark plugs, ignition coils, or spark plug wires.
  3. Clean or replace clogged fuel injectors or fuel filters.
  4. Repair any vacuum leaks in the intake manifold or vacuum lines.
  5. Address any mechanical issues in the engine, such as low compression or a leaking head gasket.

Cost to Fix P0302 2005 Infiniti G35

The cost of repairing a P0302 code can vary depending on the specific cause of the misfire. In general, replacing spark plugs, ignition coils, or fuel injectors can range from $100 to $500, including parts and labor. However, if the issue is more complex, such as a leaking head gasket or low compression, the repair costs can increase significantly. It's advisable to consult with a qualified mechanic for a precise estimate based on the specific diagnosis and repair needed. Labor rates at auto repair shops typically range from $80 to $150 per hour, but can vary based on location and shop type.

What does this mean?

Tech Notes for P0302 2005 Infiniti G35

The P0302 code means that cylinder #2 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 #2. 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 P0302 2005 Infiniti G35 code?

Need more information on how to fix the P0302 2005 Infiniti G35 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0302 2005 Infiniti G35 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 P0302 2005 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0302 (Number 2 Cylinder Misfire Detected) on a 2005 Infiniti G35?

Symptoms may include rough idling, loss of power, engine hesitation, increased fuel consumption, and potentially a check engine light.

2. What are the possible causes of a P0302 code on a 2005 Infiniti G35?

Common causes include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, low compression in the number 2 cylinder, or a malfunctioning engine control module.

3. How can I diagnose the specific cause of a cylinder misfire in my 2005 Infiniti G35?

A thorough diagnostic process may involve checking spark plugs, ignition coils, fuel injectors, vacuum lines, compression in the number 2 cylinder, and scanning for any other related fault codes.

4. Can driving with a P0302 code on a 2005 Infiniti G35 cause further damage?

Continued driving with a cylinder misfire can potentially damage the catalytic converter and other components of the engine, leading to more costly repairs.

5. How do I repair a P0302 code on my 2005 Infiniti G35?

Repair options may include replacing spark plugs, ignition coils, fuel injectors, addressing vacuum leaks, performing a compression test, or reprogramming the engine control module.

6. Is it safe to drive my 2005 Infiniti G35 with a cylinder misfire until I can get it repaired?

It is not recommended to drive your vehicle with a cylinder misfire, as it can lead to further damage and potentially unsafe driving conditions.

7. Can bad fuel quality cause a P0302 code on a 2005 Infiniti G35?

Poor fuel quality or contaminated fuel can contribute to cylinder misfires, so it's important to use high-quality fuel from reputable sources.

8. How often should spark plugs be replaced in a 2005 Infiniti G35 to prevent cylinder misfires?

Spark plugs typically have a recommended replacement interval of around 30,000 to 50,000 miles, but this can vary based on driving conditions and the type of spark plugs used.

9. Will resetting the OBDII code P0302 on a 2005 Infiniti G35 make the issue go away?

Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying issue causing the cylinder misfire. It's important to diagnose and repair the problem to prevent further damage.

10. Can a dirty air filter cause a cylinder misfire and trigger a P0302 code on a 2005 Infiniti G35?

While a dirty air filter can affect engine performance, it is less likely to directly cause a cylinder misfire. It's still good practice to regularly replace air filters to maintain optimal engine performance.

Discuss the causes and fixes for P0302 2005 Infiniti G35 OBDII Code

Submit a New Comment

Code P0302 2005 Infiniti G35 comments

No comments found for this page.