P0302 2009 Nissan Altima Sedan Code - Number 2 Cylinder Misfire Detected
Quick Answer
When a misfire occurs, engine speed will fluctuate. Common causes include Faulty Spark Plug #2, Clogged or faulty Fuel Injector #2, Faulty Ignition Coil #2. 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 2009 Nissan Altima Sedan indicates Number 2 Cylinder Misfire Detected.
- Common causes
- Common causes include Faulty Spark Plug #2, Clogged or faulty Fuel Injector #2, Faulty Ignition Coil #2.
- 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.
Code P0302 2009 Nissan Altima Sedan Description
What are the Possible Causes of the DTC P0302 2009 Nissan Altima Sedan?
- Faulty Spark Plug #2
- Clogged or faulty Fuel Injector #2
- Faulty Ignition Coil #2
- Fuel Injector #2 harness is open or shorted
- Fuel Injector #2 circuit poor electrical connection
- Ignition Coil #2 harness is open or shorted
- Ignition Coil #2 circuit poor electrical connection
- Insufficient cylinder 2 compression
- Incorrect fuel pressure
- Intake air leak
How to Fix the DTC P0302 2009 Nissan Altima Sedan?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0302 2009 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0302 2009 Nissan Altima Sedan Code
1. What are the common symptoms of OBDII code P0302 on a 2009 Nissan Altima Sedan?
A: Common symptoms of code P0302, indicating a misfire in the number 2 cylinder, may include rough idling, loss of power, and noticeable engine vibration.
2. What are the possible causes of a number 2 cylinder misfire in a 2009 Nissan Altima Sedan?
A: The misfire in the number 2 cylinder of a 2009 Nissan Altima Sedan could be caused by issues like faulty spark plugs, a malfunctioning ignition coil, vacuum leaks, or fuel delivery problems.
3. How can I diagnose the source of a misfire in the number 2 cylinder of my 2009 Nissan Altima Sedan?
A: To diagnose the cause of the misfire, you can start by checking the spark plugs, ignition coil, and fuel injector for the number 2 cylinder. Additionally, performing a compression test and inspecting for vacuum leaks can help pinpoint the issue.
4. Can a dirty or clogged fuel injector trigger OBDII code P0302 on a 2009 Nissan Altima Sedan?
A: Yes, a dirty or clogged fuel injector for the number 2 cylinder can disrupt the air-fuel mixture, leading to a misfire and triggering code P0302 on a 2009 Nissan Altima Sedan.
5. Are there any DIY repair tips for addressing a number 2 cylinder misfire in a 2009 Nissan Altima Sedan?
A: DIY repair tips for resolving a misfire in the number 2 cylinder may include replacing the spark plugs, checking and cleaning the fuel injector, inspecting the ignition coil, and ensuring there are no vacuum leaks.
6. What are the consequences of ignoring OBDII code P0302 on a 2009 Nissan Altima Sedan?
A: Ignoring code P0302, indicating a misfire in the number 2 cylinder, can lead to increased emissions, reduced fuel efficiency, engine damage, and potential catalytic converter issues if left unresolved.
7. Is it safe to drive a 2009 Nissan Altima Sedan with OBDII code P0302 active?
A: It is not recommended to drive a 2009 Nissan Altima Sedan with an active misfire code P0302, as it can cause further damage to the engine and emission control systems.
8. How much can I expect to pay for professional repairs for OBDII code P0302 on a 2009 Nissan Altima Sedan?
A: The cost of professional repairs for resolving a misfire in the number 2 cylinder, indicated by code P0302, on a 2009 Nissan Altima Sedan can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more.
9. Will resetting the OBDII code P0302 on a 2009 Nissan Altima Sedan make the issue go away?
A: Simply resetting the OBDII code P0302 on a 2009 Nissan Altima Sedan will not fix the underlying problem causing the misfire in the number 2 cylinder. It is important to diagnose and address the root cause of the issue to prevent further damage.
10. How long does it typically take to repair a number 2 cylinder misfire on a 2009 Nissan Altima Sedan?
A: The time required to repair a misfire in the number 2 cylinder of a 2009 Nissan Altima Sedan can vary based on the specific issue but may take anywhere from 1 to 4 hours for diagnosis and repairs to be completed.
Discuss the causes and fixes for P0302 2009 Nissan Altima Sedan OBDII Code
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On 3/01/2016 my car was jerking at a low speed (<25mph). My P0302 code was solved by replacing the ignition coil only and the problem was solved. I had a P0303 code 2 months prior and I replaced the ignition coil also and the problem was solved. I have the original ignition coils from factory and my car have over 100,000 miles so it was time. I am waiting to see how long the other two last before I replace those. Even though the printout suggested changing the head gasket if I seen a leak. There was no leak and I did not change any spark plugs. I hope this help someone.
Dave. -
I have a 2009 Nissan Altima 2.5 misfire cylinder 2, replaced the coil pack, replaced all spark plugs, switched coil pack from number two to number one still have a misfire on cylinder 2. At times it runs smooth and at times very rough as the misfire occurs, the misfire is more frequent the more the car is driven, where to go now for the fix?
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The next step is to perform a compression test. Sounds like you may have a blown head gasket. How is the engine coolant level? any extra smog from the tail pipe?
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