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P0306 Mitsubishi Code - Cylinder 6 Misfire Detected

Quick Answer

When the diagnostic trouble code P0306 appears on a Mitsubishi vehicle, it indicates that a misfire has been detected in cylinder 6 of the engine. Common causes include Faulty ignition coil, Spark plug failure, 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
P0306 Mitsubishi indicates Cylinder 6 Misfire Detected.
Common causes
Common causes include Faulty ignition coil, Spark plug failure, 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.
What is this?
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code P0306 Mitsubishi Description

When the diagnostic trouble code P0306 appears on a Mitsubishi vehicle, it indicates that a misfire has been detected in cylinder 6 of the engine. This means that the fuel-air mixture in this particular cylinder did not ignite properly, causing a disruption in the combustion process. This can lead to a variety of performance issues, including reduced power, rough idling, poor fuel efficiency, and even engine stalling. Ignoring this code can potentially lead to damage to the catalytic converter, increased emissions, and further engine problems.

OBDII Code P0306 Mitsubishi - Cylinder 6 Misfire Detected
P0306 Mitsubishi Code - Cylinder 6 Misfire Detected

Common Causes of P0306 Mitsubishi

  1. Faulty ignition coil
  2. Spark plug failure
  3. Clogged fuel injector
  4. Vacuum leak
  5. Low compression in cylinder 6

Symptoms of P0306 Mitsubishi

  1. Engine misfires or runs rough
  2. Loss of power or acceleration
  3. Increased fuel consumption
  4. Engine hesitation or stumbling
  5. Illuminated check engine light

How to Fix P0306 Mitsubishi

  1. Perform a visual inspection of the ignition coil, spark plug, and fuel injector in cylinder 6.
  2. Test the ignition coil using a multimeter to check for proper resistance.
  3. Replace the spark plug in cylinder 6 with a new one.
  4. Clean or replace the fuel injector in cylinder 6.
  5. Conduct a compression test on cylinder 6 to check for any issues with the piston rings or valves.

Cost to Fix P0306 Mitsubishi

The cost of repairing a cylinder 6 misfire in a Mitsubishi can vary depending on the specific cause of the issue. Typically, replacing an ignition coil can cost between $100 and $200, while replacing a spark plug may range from $10 to $30. Cleaning or replacing a fuel injector can cost around $50 to $100. Additionally, labor costs can add up, with rates ranging from $80 to $150 per hour. Overall, the total repair cost for addressing a P0306 code in a Mitsubishi could fall within the range of $200 to $500. It's advisable to consult with a mechanic or auto repair shop for a more accurate estimate based on the specific circumstances.

What does this mean?

Tech Notes for P0306 Mitsubishi

The P0306 code means that the cylinder 6 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 6. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes"

When is the Code Detected?

Engine Cylinder 6 is Misfiring.

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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 P0306 Mitsubishi Code

1. What are the common symptoms of OBDII code P0306 (Cylinder 6 Misfire Detected) in a Mitsubishi?

- Common symptoms include engine misfiring, rough idling, loss of power, and increased fuel consumption.

2. What are the possible causes of a cylinder 6 misfire in a Mitsubishi triggering code P0306?

- Potential causes include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, low compression, or issues with the engine control module.

3. How can I diagnose the root cause of a cylinder 6 misfire in my Mitsubishi with OBDII code P0306?

- Diagnosis typically involves checking the spark plugs, ignition coils, fuel injectors, compression levels, vacuum lines, and performing a scan tool test to pinpoint the exact issue.

4. Can a dirty or clogged fuel injector cause a cylinder 6 misfire leading to OBDII code P0306 in a Mitsubishi?

- Yes, a dirty or clogged fuel injector can disrupt the fuel delivery to cylinder 6, leading to misfires and triggering the P0306 code.

5. What are some repair tips for resolving a cylinder 6 misfire in a Mitsubishi with code P0306?

- Repair tips may include replacing spark plugs, ignition coils, fuel injectors, addressing vacuum leaks, performing a compression test, and ensuring proper engine timing.

6. Is it safe to drive my Mitsubishi with OBDII code P0306 indicating a cylinder 6 misfire?

- It is not recommended to drive the vehicle extensively with a misfire issue as it can cause damage to the catalytic converter and other components. It's best to address the problem promptly.

7. How crucial is it to fix a cylinder 6 misfire associated with code P0306 in a Mitsubishi?

- Resolving the misfire issue is essential to ensure optimal engine performance, fuel efficiency, and to prevent potential damage to the engine components over time.

8. Can an intermittent misfire trigger OBDII code P0306 on a Mitsubishi even if the issue seems to come and go?

- Yes, an intermittent misfire can still trigger the P0306 code if the misfire is detected during the vehicle's self-diagnostic tests, even if it does not occur constantly.

9. Will resetting the OBDII trouble codes clear the P0306 code related to cylinder 6 misfire in a Mitsubishi?

- Resetting the codes may temporarily clear the P0306 code, but it will likely return if the underlying issue causing the misfire is not addressed.

10. How can a professional mechanic help me diagnose and repair a cylinder 6 misfire with OBDII code P0306 in my Mitsubishi?

- A qualified mechanic can use specialized equipment to perform in-depth diagnostics, identify the root cause of the misfire, and expertly repair or replace faulty components to resolve the issue effectively.

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