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P0302 2012 Nissan Sentra Code - Number 2 Cylinder Misfire Detected

Quick Answer

The P0302 diagnostic trouble code (DTC) for a 2012 Nissan Sentra indicates that a misfire has been detected in the number 2 cylinder of the engine. Common causes include Faulty spark plug or ignition coil, Clogged fuel injector, Vacuum leak in the intake manifold. 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 2012 Nissan Sentra indicates Number 2 Cylinder Misfire Detected.
Common causes
Common causes include Faulty spark plug or ignition coil, Clogged fuel injector, Vacuum leak in the intake manifold.
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 30, 2024
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Code P0302 2012 Nissan Sentra Description

The P0302 diagnostic trouble code (DTC) for a 2012 Nissan Sentra indicates that a misfire has been detected in the number 2 cylinder of the engine. This means that the cylinder is not firing properly, which can lead to a rough running engine, reduced power, decreased fuel efficiency, and potentially even engine damage if left unresolved. The misfire can be caused by a variety of issues, such as a faulty spark plug, ignition coil, fuel injector, vacuum leak, or even a mechanical problem within the engine.

OBDII Code P0302 2012 Nissan Sentra - Number 2 Cylinder Misfire Detected
P0302 2012 Nissan Sentra Code - Number 2 Cylinder Misfire Detected

Common Causes of P0302 2012 Nissan Sentra

  1. Faulty spark plug or ignition coil
  2. Clogged fuel injector
  3. Vacuum leak in the intake manifold
  4. Low compression in the number 2 cylinder
  5. Engine timing issues

Symptoms of P0302 2012 Nissan Sentra

  1. Rough idle or engine vibrations
  2. Loss of power or acceleration
  3. Decreased fuel efficiency
  4. Engine knocking or pinging sounds
  5. Illumination of the check engine light

How to Fix P0302 2012 Nissan Sentra

  1. Perform a visual inspection of the spark plug and ignition coil for signs of wear or damage.
  2. Check the fuel injector for clogs or leaks, and clean or replace as needed.
  3. Perform a compression test on the number 2 cylinder to check for any mechanical issues.
  4. Inspect the intake manifold for vacuum leaks and repair as necessary.
  5. Reset the engine control module (ECM) after completing repairs and test drive the vehicle to ensure the misfire is resolved.

Cost to Fix P0302 2012 Nissan Sentra

The cost of repairing a misfire in the number 2 cylinder of a 2012 Nissan Sentra can vary depending on the specific cause of the issue. On average, the cost of parts such as a spark plug, ignition coil, or fuel injector can range from $50 to $200 each. Labor costs can range from $100 to $300, depending on the shop's hourly rate and the complexity of the repair. Overall, the total cost of resolving this issue could range from $150 to $600 or more. It's always recommended to get a detailed quote from a trusted mechanic before proceeding with the repair.

What does this mean?

Tech Notes for P0302 2012 Nissan Sentra

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 2012 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0302 (Number 2 Cylinder Misfire Detected) on a 2012 Nissan Sentra?

Symptoms may include rough idling, loss of power, engine vibration, poor fuel economy, and in some cases, the Check Engine light may illuminate.

2. What are the possible causes of a cylinder 2 misfire in a 2012 Nissan Sentra?

Common causes include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, low compression, or a problem with the engine's computer system.

3. How can I diagnose the specific cause of a cylinder 2 misfire in my 2012 Nissan Sentra?

Diagnosis typically involves checking the spark plug, ignition coil, fuel injector, compression in cylinder 2, and scanning the vehicle's computer for additional error codes or data.

4. Can a dirty or clogged fuel injector cause a cylinder misfire in a 2012 Nissan Sentra?

Yes, a dirty or clogged fuel injector can disrupt the proper fuel-air mixture in cylinder 2, leading to a misfire and triggering OBDII code P0302.

5. Will driving with a cylinder misfire damage my 2012 Nissan Sentra's engine?

Continued driving with a misfiring cylinder can cause damage to the catalytic converter and other engine components over time, potentially leading to more costly repairs.

6. How can I repair a cylinder 2 misfire in my 2012 Nissan Sentra?

Repair options may include replacing the spark plug, ignition coil, fuel injector, addressing vacuum leaks, performing a compression test, or resetting the engine's computer system.

7. Is it safe to continue driving my 2012 Nissan Sentra with OBDII code P0302 until I can repair it?

It is not recommended to drive with a cylinder misfire, as it can cause further damage to the engine and potentially lead to more severe issues. It's best to address the problem promptly.

8. Can a bad ignition coil cause a cylinder misfire in a 2012 Nissan Sentra?

Yes, a faulty ignition coil can lead to a lack of spark in cylinder 2, causing a misfire and triggering the OBDII code P0302 on your Nissan Sentra.

9. How much does it typically cost to repair a cylinder misfire in a 2012 Nissan Sentra?

The cost of repair can vary depending on the specific cause of the misfire, but it may range from a few hundred dollars for basic repairs to over a thousand dollars for more extensive issues.

10. After repairing a cylinder misfire in my 2012 Nissan Sentra, how do I reset the Check Engine light?

Once the issue is fixed, the Check Engine light can be reset using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the error code.

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