AutoCodes – MINI – P0302 MINI

P0302 MINI Code - Misfire Cylinder 2

Quick Answer

When a misfire occurs, engine speed will fluctuate. Common causes include Faulty Spark Plug #2, Clogged or faulty Fuel Injector #2, Faulty Ignition Coil #2. 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 MINI indicates Misfire Cylinder 2 .
Common causes: Common causes include Faulty Spark Plug #2, Clogged or faulty Fuel Injector #2, Faulty Ignition Coil #2.
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 11,599

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0302 MINI 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 P0302 MINI - Misfire Cylinder 2 - AutoCodes.com — P0302 MINI Code - Misfire Cylinder 2

What does this mean?

What are the Possible Causes of the DTC P0302 MINI?

Faulty Spark Plug #2
Clogged or faulty Fuel Injector #2
Faulty Ignition Coil #2
Fuel Injector #2 harness is open or shorted
Fuel Injector #2 circuit poor electrical connection
Ignition Coil #2 harness is open or shorted
Ignition Coil #2 circuit poor electrical connection
Insufficient cylinder 2 compression
Incorrect fuel pressure
Intake air leak

How to Fix the DTC P0302 MINI?

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 P0302 code means that the cylinder 2 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 2. 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 P0302 MINI 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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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 P0302 MINI Code

1. What are common symptoms of OBDII code P0302 (Misfire Cylinder 2) in a MINI?

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

2. What are the possible causes of OBDII code P0302 in a MINI?

- Possible causes include faulty spark plugs, ignition coil issues, fuel injector problems, vacuum leaks, or even a malfunctioning engine control module.

3. How can I diagnose the cause of a misfire in Cylinder 2 of my MINI?

- Diagnose by checking the spark plugs, ignition coils, fuel injectors, vacuum hoses, and conducting a compression test on Cylinder 2 to identify the root cause.

4. Can a dirty air filter cause OBDII code P0302 in a MINI?

- A dirty air filter can restrict airflow to the engine, affecting the air-fuel mixture and potentially leading to misfires, including in Cylinder 2.

5. How can I fix a misfire in Cylinder 2 of my MINI?

- Fix the issue by replacing faulty spark plugs, ignition coils, or fuel injectors, repairing vacuum leaks, or addressing any underlying engine control module problems.

6. Is it safe to drive my MINI with OBDII code P0302 (Misfire Cylinder 2)?

- It's not recommended to drive your MINI with a misfire as it can cause damage to the catalytic converter and other engine components.

7. Can bad gasoline trigger OBDII code P0302 in a MINI?

- Poor quality or contaminated gasoline can lead to misfires, including in Cylinder 2, due to improper combustion or fuel delivery issues.

8. How often should I perform maintenance to prevent OBDII code P0302 in my MINI?

- Regular maintenance, including changing spark plugs, inspecting ignition components, and ensuring proper fuel system operation, can help prevent misfires.

9. Can a software update fix OBDII code P0302 in a MINI?

- In some cases, a software update to the engine control module can resolve misfire issues related to OBDII code P0302 by optimizing engine performance.

10. What should I do if OBDII code P0302 persists after attempting repairs on my MINI?

- If the code persists after repairs, consider seeking assistance from a qualified mechanic or MINI dealership to diagnose and address the underlying issue effectively.