P0302 2003 Infiniti G35 Code - Number 2 Cylinder Misfire Detected
Quick Answer
When the diagnostic code P0302 appears on a 2003 Infiniti G35, it indicates that a misfire has been detected in the number 2 cylinder of the engine. Common causes include Faulty spark plug, Failing ignition coil, Clogged 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
- P0302 2003 Infiniti G35 indicates Number 2 Cylinder Misfire Detected.
- Common causes
- Common causes include Faulty spark plug, Failing ignition coil, Clogged 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 P0302 2003 Infiniti G35 Description
When the diagnostic code P0302 appears on a 2003 Infiniti G35, it 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 variety of performance issues. The misfire can cause a lack of power, rough idling, hesitation or stumbling when accelerating, increased fuel consumption, and potentially even engine vibration. Ignoring this issue can lead to further damage to the engine over time, potentially resulting in more costly repairs.
Common Causes of P0302 2003 Infiniti G35
- Faulty spark plug
- Failing ignition coil
- Clogged fuel injector
- Vacuum leak in the intake manifold
- Faulty engine control module
Symptoms of P0302 2003 Infiniti G35
- Engine misfires or runs rough
- Loss of power or acceleration
- Rough idling or shaking
- Decreased fuel efficiency
- Check Engine light illuminated
How to Fix P0302 2003 Infiniti G35
- Begin by diagnosing the specific cause of the misfire by performing a thorough inspection of the spark plug, ignition coil, fuel injector, and vacuum lines.
- Replace the faulty component identified during the diagnosis, such as the spark plug, ignition coil, or fuel injector.
- Clear the diagnostic trouble codes and reset the engine control module to see if the misfire issue has been resolved.
- Test drive the vehicle to ensure that the misfire has been successfully addressed and that the engine is running smoothly.
- If the misfire persists, further diagnostics may be required to pinpoint the exact cause, such as performing a compression test or inspecting the engine control module.
Cost to Fix P0302 2003 Infiniti G35
The typical repair costs for addressing a number 2 cylinder misfire in a 2003 Infiniti G35 can vary depending on the specific cause of the issue and the parts needed for repair. On average, the cost of replacing a spark plug, ignition coil, or fuel injector can range from $100 to $300 per component, not including labor costs. The total repair cost, including parts and labor, can range from $200 to $800 or more. It is important to note that labor rates at auto repair shops can vary, so it is recommended to obtain a detailed estimate from a qualified mechanic before proceeding with the repair.
Tech Notes for P0302 2003 Infiniti G35
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Frequently Asked Questions about P0302 2003 Infiniti G35 Code
1. What does OBDII code P0302 mean on a 2003 Infiniti G35?
P0302 indicates that the engine control module (ECM) has detected a misfire specifically in cylinder number 2.
2. What are the symptoms of a P0302 code in a 2003 Infiniti G35?
Common symptoms include rough idling, engine hesitation, reduced power, poor fuel economy, and a flashing or steady check engine light.
3. What causes a P0302 code on a 2003 Infiniti G35?
Possible causes include a faulty spark plug, a bad ignition coil, fuel injector issues, vacuum leaks, low compression in cylinder 2, or problems with the ECM.
4. Can I drive my 2003 Infiniti G35 with a P0302 code?
It’s not recommended to drive with a P0302 code, as prolonged misfires can cause engine damage, overheating of the catalytic converter, and reduced performance.
5. How do I fix a P0302 code on my 2003 Infiniti G35?
Start by inspecting and replacing the spark plug and ignition coil for cylinder 2 if necessary. If the issue persists, check the fuel injector, cylinder compression, and for any vacuum leaks.
6. How can I identify cylinder number 2 on a 2003 Infiniti G35?
In the V6 engine of the G35, cylinder 2 is located on the passenger side of the engine, second cylinder from the front.
7. Can a dirty air filter cause a P0302 code on a 2003 Infiniti G35?
While unlikely, a severely clogged air filter can affect overall engine performance and contribute to misfires indirectly. It’s worth inspecting the air filter as part of routine maintenance.
8. Will a bad fuel injector cause a P0302 code in my 2003 Infiniti G35?
Yes, a clogged or malfunctioning fuel injector in cylinder 2 can disrupt the air-fuel mixture and lead to a misfire.
9. How much does it cost to repair a P0302 code on a 2003 Infiniti G35?
The cost depends on the root cause. Replacing a spark plug or ignition coil may cost $100-$300, while fuel injector or compression-related repairs can be more expensive.
10. Can a P0302 code be caused by bad fuel?
Yes, contaminated or low-quality fuel can cause misfires, including in cylinder 2, so it’s worth considering if you recently filled up with questionable fuel.
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