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Engine-Codes – MINI – P1304 MINI

P1304 MINI Code - Misfiring Cylinder 4

Quick Answer

The P1304 code for MINI indicates a misfiring cylinder 4, which means that the engine is not running smoothly in that specific cylinder. Common causes include Faulty spark plug, Failing 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
P1304 MINI indicates Misfiring Cylinder 4.
Common causes
Common causes include Faulty spark plug, Failing 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1304 MINI Description

The P1304 code for MINI indicates a misfiring cylinder 4, which means that the engine is not running smoothly in that specific cylinder. This can lead to a reduction in engine performance, fuel efficiency, and overall drivability of the vehicle. When a cylinder misfires, it can cause rough idling, hesitation or jerking during acceleration, loss of power, and increased emissions. Ignoring this issue can potentially lead to damage to the catalytic converter, O2 sensors, and other engine components over time.

OBDII Code P1304 MINI - Misfiring Cylinder 4
P1304 MINI Code - Misfiring Cylinder 4

Common Causes of P1304 MINI

  1. Faulty spark plug
  2. Failing ignition coil
  3. Clogged or malfunctioning fuel injector
  4. Vacuum leak in the intake system
  5. Low compression in the cylinder

Symptoms of P1304 MINI

  1. Rough idling
  2. Hesitation or jerking during acceleration
  3. Loss of power
  4. Increased fuel consumption
  5. Illumination of the check engine light

How to Fix P1304 MINI

  1. Use an OBD-II scanner to confirm the P1304 code and pinpoint cylinder 4.
  2. Inspect the spark plug, ignition coil, and fuel injector for any signs of damage or wear.
  3. Perform a compression test on cylinder 4 to check for any internal engine issues.
  4. Address any vacuum leaks in the intake system.
  5. Replace any faulty components identified during the diagnostic process.

Cost to Fix P1304 MINI

The cost of repairing a misfiring cylinder 4 can vary depending on the specific cause of the issue and the cost of parts and labor in your area. Generally, a repair for this code could range from $100 to $500, including parts and labor. However, it's important to note that rates can vary greatly between different auto repair shops and dealerships. It's recommended to get a few quotes from local mechanics to get a more accurate estimate for your specific situation.

What does this mean?

Tech Notes for P1304 MINI

Ignition monitoring cylinder spark duration too short

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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.

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