P0304 2004 Nissan Maxima Code - Number 4 Cylinder Misfire Detected
Quick Answer
When a misfire occurs, engine speed will fluctuate. Common causes include Faulty Spark Plug #4, Clogged or faulty Fuel Injector #4, Faulty Ignition Coil #4. 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
- P0304 2004 Nissan Maxima indicates Number 4 Cylinder Misfire Detected.
- Common causes
- Common causes include Faulty Spark Plug #4, Clogged or faulty Fuel Injector #4, Faulty Ignition Coil #4.
- 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 P0304 2004 Nissan Maxima Description
What are the Possible Causes of the DTC P0304 2004 Nissan Maxima?
- Faulty Spark Plug #4
- Clogged or faulty Fuel Injector #4
- Faulty Ignition Coil #4
- Fuel Injector #4 harness is open or shorted
- Fuel Injector #4 circuit poor electrical connection
- Ignition Coil #4 harness is open or shorted
- Ignition Coil #4 circuit poor electrical connection
- Insufficient cylinder 4 compression
- Incorrect fuel pressure
- Intake air leak
How to Fix the DTC P0304 2004 Nissan Maxima?
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 P0304 2004 Nissan Maxima 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 P0304 2004 Nissan Maxima Code
1. What are the common symptoms of OBDII code P0304 on a 2004 Nissan Maxima?
- Common symptoms include engine misfires, rough idling, loss of power, and a noticeable decrease in fuel efficiency.
2. What is the main cause of OBDII code P0304 on a 2004 Nissan Maxima?
- The main cause of code P0304 is a misfire in the number 4 cylinder, which can be due to issues like faulty spark plugs, ignition coils, or fuel injectors.
3. How can I diagnose the source of the misfire in the number 4 cylinder of my 2004 Nissan Maxima?
- You can diagnose the issue by performing a thorough inspection of the spark plugs, ignition coils, fuel injectors, and the engine's compression levels.
4. Can a dirty or clogged fuel injector cause OBDII code P0304 on a 2004 Nissan Maxima?
- Yes, a dirty or clogged fuel injector can disrupt the fuel-air mixture in the number 4 cylinder, leading to a misfire and triggering code P0304.
5. What are some repair tips for addressing OBDII code P0304 on a 2004 Nissan Maxima?
- Repair tips include replacing the spark plugs, ignition coils, and fuel injectors in the number 4 cylinder, checking for vacuum leaks, and performing a fuel system cleaning.
6. Are there any other possible causes of OBDII code P0304 on a 2004 Nissan Maxima besides ignition system issues?
- Yes, other possible causes include a vacuum leak, low compression in the number 4 cylinder, or problems with the engine's timing.
7. Is it safe to continue driving my 2004 Nissan Maxima with OBDII code P0304?
- It is not recommended to drive with a misfire as it can cause further damage to the engine and emissions system. It's best to address the issue promptly.
8. How much does it typically cost to repair OBDII code P0304 on a 2004 Nissan Maxima?
- The cost of repair can vary depending on the exact cause of the misfire, but it may range from $100 to $500 or more, including parts and labor.
9. Will resetting the OBDII code P0304 on my 2004 Nissan Maxima make the issue go away?
- Simply resetting the code will not fix the underlying issue causing the misfire. It's important to diagnose and repair the root cause of the problem.
10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P0304 on a 2004 Nissan Maxima?
- Depending on the exact cause of the misfire, some repairs like replacing spark plugs or ignition coils can be done by a DIY enthusiast. However, more complex issues may require professional assistance.
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