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P0302 Nissan Code - Number 2 Cylinder Misfire Detected

Quick Answer

When a vehicle's onboard diagnostic system detects a misfire in the number 2 cylinder, indicated by the P0302 diagnostic trouble code (DTC), it means that the engine is not running smoothly and efficiently. Common causes include Faulty ignition system components such as spark plugs, ignition coils, or wires, Clogged or dirty fuel injectors, Vacuum leaks in the intake system. 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 Nissan indicates Number 2 Cylinder Misfire Detected.
Common causes
Common causes include Faulty ignition system components such as spark plugs, ignition coils, or wires, Clogged or dirty fuel injectors, Vacuum leaks in the intake system.
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 Aug 18, 2024
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Code P0302 Nissan Description

When a vehicle's onboard diagnostic system detects a misfire in the number 2 cylinder, indicated by the P0302 diagnostic trouble code (DTC), it means that the engine is not running smoothly and efficiently. A misfire occurs when the fuel in the cylinder fails to ignite at the proper time, leading to a lack of power, rough idling, and potential engine damage over time. In the case of a number 2 cylinder misfire, this specific cylinder is not firing correctly, causing a disruption in the engine's balance and performance.

OBDII Code P0302 Nissan - Number 2 Cylinder Misfire Detected
P0302 Nissan Code - Number 2 Cylinder Misfire Detected

Common Causes of P0302 Nissan

  1. Faulty ignition system components such as spark plugs, ignition coils, or wires.
  2. Clogged or dirty fuel injectors.
  3. Vacuum leaks in the intake system.
  4. Low compression in the number 2 cylinder due to worn piston rings or valves.
  5. Engine timing issues, such as a jumped timing belt or chain.

Symptoms of P0302 Nissan

  1. Rough idle or vibrations while the engine is running.
  2. Loss of power or acceleration.
  3. Engine misfiring or hesitation during acceleration.
  4. Increased fuel consumption.
  5. Illumination of the check engine light on the dashboard.

How to Fix P0302 Nissan

  1. Start by inspecting and replacing faulty spark plugs, ignition coils, or wires in the number 2 cylinder.
  2. Clean or replace clogged fuel injectors to ensure proper fuel delivery.
  3. Check for vacuum leaks in the intake system and repair or replace any damaged components.
  4. Perform a compression test on the number 2 cylinder to determine if there are any issues with piston rings or valves.
  5. Verify engine timing and adjust if necessary to ensure proper synchronization.

Cost to Fix P0302 Nissan

The cost of repairing a number 2 cylinder misfire detected by the P0302 code can vary depending on the specific cause of the issue and the labor rates in your area. Generally, you can expect to pay between $100 and $500 for parts and labor. Keep in mind that additional diagnostic time may be needed to pinpoint the exact cause of the misfire, so it's advisable to consult with a qualified mechanic for a more accurate estimate.

What does this mean?

Tech Notes for P0302 Nissan

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.





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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 P0302 Nissan Code

1. What are the common symptoms of OBDII code P0302 (Nissan) - Number 2 Cylinder Misfire Detected?

- Common symptoms include rough idling, loss of power, engine misfires, and potentially increased fuel consumption.

2. What are the possible causes of OBDII code P0302 (Nissan) - Number 2 Cylinder Misfire Detected?

- Causes may include faulty spark plugs, a malfunctioning ignition coil, vacuum leaks, fuel delivery issues, or problems with the engine's compression.

3. How can I diagnose the Number 2 Cylinder Misfire Detected code on my Nissan?

- To diagnose this code, you can use an OBDII scanner to read the code, check the spark plugs and ignition coil, perform a compression test, and inspect for any vacuum leaks.

4. Can a dirty fuel injector cause the P0302 code on a Nissan?

- Yes, a dirty or clogged fuel injector can lead to a misfire in the number 2 cylinder, triggering the P0302 code.

5. Is it safe to continue driving with OBDII code P0302 (Nissan) indicating a misfire in the number 2 cylinder?

- It is not recommended to drive for an extended period with a misfire, as it can lead to further damage to the engine and the catalytic converter.

6. How can I repair OBDII code P0302 (Nissan) - Number 2 Cylinder Misfire Detected?

- Repair options include replacing faulty spark plugs, addressing ignition coil issues, fixing vacuum leaks, cleaning or replacing fuel injectors, and ensuring proper engine compression.

7. Will resetting the OBDII code P0302 (Nissan) make the issue go away?

- Resetting the code may temporarily clear the check engine light, but it will not fix the underlying issue causing the misfire in the number 2 cylinder.

8. Can a bad ignition coil cause only one cylinder to misfire?

- Yes, a faulty ignition coil can cause a specific cylinder, such as the number 2 cylinder, to misfire, triggering the P0302 code.

9. How important is it to address the OBDII code P0302 (Nissan) promptly?

- It is crucial to address the code promptly to prevent potential damage to the engine and ensure optimal performance and fuel efficiency of your Nissan.

10. Can extreme weather conditions affect the occurrence of OBDII code P0302 (Nissan) - Number 2 Cylinder Misfire Detected?

- Extreme weather conditions can sometimes exacerbate existing issues leading to misfires, so it's essential to address any potential causes promptly, especially during such conditions.

Discuss the causes and fixes for P0302 Nissan OBDII Code

Submit a New Comment

  • On my 2007 Nissan Altima Cylinder Misfire Issue was due to faulty Ignition Coil Pack.

    Watch my YouTube video below to see how to diagnose and fix problem with bad coil wire boot:

    https://youtu.be/pP0I-iSBUF4

    You can apply the same technique for 2007-2012 Nissan Altima and

    error codes P0300, P0301, P0302, P0303, P0304, P0305 and P0306.

    Reply to Comment

  • This has happened to.me twice after driving through a rain storm!! Replaced plugs and wires and it still did it. I have a 1996 Nissan pathfinder

    Reply to Comment

  • You should also replace the distributor cap and rotor. There may be a crack on the cap and water is getting in the distributor.

    Reply to Comment

  • I have a 2007 Nissan Murano and I've changed all the spark plugs and the coils replace fuel injector on cylinder number 2 still has a misfire code what's next?

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  • The spark pugs and ignition coils are by far the mos common problem, but there some cases where the problem was the intake plenum gasket. The next step is the Intake Plenum Gasket, if possible perform a compression test to verified there no problem with the piston or cylinder.

    Reply to Comment