P0304 2005 Infiniti G35 Code - Number 4 Cylinder Misfire Detected
Quick Answer
When the OBD-II code P0304 appears on a 2005 Infiniti G35, it indicates that a misfire has been detected in the number 4 cylinder of the engine. Common causes include Worn or fouled spark plugs, Faulty ignition coil, Clogged or malfunctioning fuel injector. 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 2005 Infiniti G35 indicates Number 4 Cylinder Misfire Detected.
- Common causes
- Common causes include Worn or fouled spark plugs, Faulty ignition coil, Clogged or malfunctioning fuel injector.
- 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.
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Code P0304 2005 Infiniti G35 Description
When the OBD-II code P0304 appears on a 2005 Infiniti G35, it indicates that a misfire has been detected in the number 4 cylinder of the engine. This misfire can lead to poor engine performance, reduced fuel efficiency, and potential damage to the catalytic converter over time. A misfire occurs when the air-fuel mixture in the cylinder fails to ignite properly, causing the engine to run rough or shake. In the case of the number 4 cylinder misfire, it specifically affects the firing of that cylinder, leading to a loss of power and overall engine imbalance.
Common Causes of P0304 2005 Infiniti G35
- Worn or fouled spark plugs
- Faulty ignition coil
- Clogged or malfunctioning fuel injector
- Vacuum leaks in the intake manifold
- Low compression in the number 4 cylinder
Symptoms of P0304 2005 Infiniti G35
- Rough idle or shaking engine
- Loss of power or acceleration
- Engine misfires or hesitation during acceleration
- Increased fuel consumption
- Check Engine Light illuminated
How to Fix P0304 2005 Infiniti G35
- Diagnose the specific cause of the misfire by performing a thorough inspection of the ignition system, fuel system, and engine compression.
- Replace the spark plugs and ignition coils in the number 4 cylinder.
- Clean or replace the fuel injector if it is found to be faulty.
- Check for vacuum leaks and repair as necessary.
- Perform a compression test on the number 4 cylinder to determine if there are any internal engine issues causing the misfire.
Cost to Fix P0304 2005 Infiniti G35
The cost of repairing a number 4 cylinder misfire on a 2005 Infiniti G35 can vary depending on the specific cause of the issue. On average, the cost of replacing spark plugs and ignition coils can range from $150 to $300, while cleaning or replacing a fuel injector may cost between $50 and $200. Diagnosing the issue and performing a compression test can add additional costs, bringing the total repair bill to anywhere from $300 to $800. It is important to note that labor rates at auto repair shops can vary, so it is advisable to obtain quotes from multiple shops to ensure a competitive price.
Tech Notes for P0304 2005 Infiniti G35
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Frequently Asked Questions about P0304 2005 Infiniti G35 Code
1. What does the OBDII code P0304 mean on a 2005 Infiniti G35?
P0304 indicates a misfire has been detected in cylinder number 4 of your vehicle's engine.
2. What are the common symptoms of code P0304 in a 2005 Infiniti G35?
Symptoms may include rough idling, reduced engine power, poor fuel economy, engine hesitation, or the Check Engine Light turning on.
3. What causes a P0304 code on a 2005 Infiniti G35?
Common causes include a faulty spark plug, a defective ignition coil, a clogged fuel injector, low cylinder compression, or a vacuum leak near cylinder 4.
4. Can driving with a P0304 code damage my 2005 Infiniti G35?
Yes, prolonged driving with a misfire can damage the catalytic converter or other engine components. It’s best to address the issue promptly.
5. How can I diagnose the P0304 code on my 2005 Infiniti G35?
Start by inspecting the spark plug and ignition coil for cylinder 4. You can also check for vacuum leaks, test the fuel injector, and perform a compression test.
6. How do I fix the P0304 code on my 2005 Infiniti G35?
Common fixes include replacing the faulty spark plug or ignition coil, cleaning or replacing the fuel injector, and repairing any vacuum leaks.
7. Could a dirty air filter cause the P0304 code on a 2005 Infiniti G35?
While unlikely, a severely clogged air filter could impact engine performance. It’s worth inspecting as part of general maintenance.
8. How much does it cost to repair a P0304 code on a 2005 Infiniti G35?
Repair costs vary but typically range from $100 to $400 depending on whether it’s a spark plug, ignition coil, or fuel injector issue.
9. Can a bad ECU cause the P0304 code on a 2005 Infiniti G35?
While rare, a malfunctioning ECU can cause misfire codes. However, it’s more common for the issue to be related to the ignition or fuel system.
10. Is it safe to clear the P0304 code without fixing the problem on a 2005 Infiniti G35?
Clearing the code without addressing the root cause may temporarily turn off the Check Engine Light but won’t fix the underlying issue, which could lead to further damage.
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