AutoCodes – Mitsubishi – P0308 Mitsubishi

P0308 Mitsubishi Code - Cylinder 8 Misfire Condition

Quick Answer

When a misfire occurs, engine speed will fluctuate. Common causes include Faulty spark plug 8, Clogged or faulty fuel injector 8, Faulty ignition coil 8. 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: P0308 Mitsubishi indicates Cylinder 8 Misfire Condition.
Common causes: Common causes include Faulty spark plug 8, Clogged or faulty fuel injector 8, Faulty ignition coil 8.
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 Popularity 3,606

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0308 Mitsubishi Description

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.

OBDII Code P0308 Mitsubishi - Cylinder 8 Misfire Condition - AutoCodes.com — P0308 Mitsubishi Code - Cylinder 8 Misfire Condition

What does this mean?

What are the Possible Causes of the DTC P0308 Mitsubishi?

Faulty spark plug 8
Clogged or faulty fuel injector 8
Faulty ignition coil 8
Fuel injector 8 harness is open or shorted
Fuel injector 8 circuit poor electrical connection
Ignition coil 8 harness is open or shorted
Ignition coil 8 circuit poor electrical connection
Insufficient cylinder 8 compression
Incorrect fuel pressure
Intake air leak

How to Fix the DTC P0308 Mitsubishi?

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.

What does this mean?

Code Tech Notes

The P0308 code means that the cylinder 8 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 8. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes"

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0308 Mitsubishi 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.

Need more information about the P0308 Mitsubishi code?

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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 P0308 Mitsubishi Code

1. What are common symptoms of OBDII code P0308 in a Mitsubishi indicating a cylinder 8 misfire condition?

- Common symptoms include engine misfiring, rough idling, loss of power, and potential engine vibrations.

2. What are some possible causes of the P0308 code in a Mitsubishi related to cylinder 8 misfire?

- Potential causes may include faulty spark plugs or ignition coils, vacuum leaks, low compression in the cylinder, or issues with the fuel injector.

3. How can I diagnose the source of the cylinder 8 misfire in my Mitsubishi triggering the P0308 code?

- Diagnostic steps may involve checking spark plugs, ignition coils, compression levels, fuel injector operation, and conducting a thorough visual inspection of related components.

4. Is it safe to continue driving my Mitsubishi with OBDII code P0308 indicating a cylinder 8 misfire?

- It is not recommended to drive the vehicle with a misfire as it can lead to further damage to the engine or catalytic converter. Immediate attention is advised.

5. Are there any simple maintenance tips to prevent the occurrence of the cylinder 8 misfire in a Mitsubishi triggering the P0308 code?

- Regularly scheduled maintenance such as changing spark plugs, checking ignition components, and using high-quality fuel can help prevent misfires.

6. How can I clear the OBDII code P0308 related to a cylinder 8 misfire in my Mitsubishi after addressing the issue?

- The code can be cleared using an OBDII scanner or by disconnecting the car's battery for a few minutes. However, the underlying issue should be resolved first.

7. What is the typical repair process for resolving the cylinder 8 misfire causing the P0308 code in a Mitsubishi?

- The repair process may involve replacing faulty spark plugs, ignition coils, addressing vacuum leaks, checking compression levels, or cleaning/replacing the fuel injector.

8. Can weather conditions or driving habits contribute to the occurrence of OBDII code P0308 in a Mitsubishi indicating a cylinder 8 misfire?

- Extreme weather conditions, poor fuel quality, or aggressive driving habits can potentially contribute to the occurrence of a cylinder 8 misfire triggering the P0308 code.

9. Should I seek professional help to diagnose and repair the cylinder 8 misfire issue causing the P0308 code in my Mitsubishi?

- It is advisable to seek assistance from a qualified mechanic or technician to accurately diagnose and repair the cylinder 8 misfire issue triggering the P0308 code.

10. How can I prevent future instances of the cylinder 8 misfire in my Mitsubishi leading to the OBDII code P0308?

- Regular maintenance, prompt address of engine issues, driving conservatively, and using high-quality fuel can help prevent future cylinder 8 misfire occurrences triggering the P0308 code.