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Engine-Codes – Generic – P1302

P1302 Code - Cylinder Number 2 Random Misfire Detected

Quick Answer

The diagnostic trouble code P1302 indicates that a random misfire has been detected in cylinder number 2 of the vehicle's engine. Common causes include Faulty spark plugs or ignition coils, Clogged fuel injectors, Vacuum leaks. 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
P1302 indicates Cylinder Number 2 Random Misfire Detected.
Common causes
Common causes include Faulty spark plugs or ignition coils, Clogged fuel injectors, Vacuum leaks.
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 09, 2024
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Code P1302 Description

The diagnostic trouble code P1302 indicates that a random misfire has been detected in cylinder number 2 of the vehicle's engine. This means that the engine is not running smoothly and efficiently in that specific cylinder, which can lead to various performance issues. A misfire occurs when the air-fuel mixture in the cylinder does not ignite properly or does not ignite at all. This can result in a loss of power, decreased fuel efficiency, rough idling, and potentially cause damage to the engine in the long run.

OBDII Code P1302 - Cylinder Number 2 Random Misfire Detected
P1302 Code - Cylinder Number 2 Random Misfire Detected

Common Causes of P1302

  1. Faulty spark plugs or ignition coils
  2. Clogged fuel injectors
  3. Vacuum leaks
  4. Low compression in cylinder number 2
  5. Faulty engine sensors (e.g., crankshaft position sensor)

Symptoms of P1302

  1. Engine misfires or runs rough
  2. Decreased fuel efficiency
  3. Loss of power
  4. Rough idling or vibrations
  5. Check engine light illuminated

How to Fix P1302

  1. Diagnose the specific cause of the misfire by performing a thorough inspection of the ignition system, fuel system, and engine components.
  2. Replace spark plugs and ignition coils in cylinder number 2 if they are found to be faulty.
  3. Clean or replace clogged fuel injectors.
  4. Check for vacuum leaks and repair as needed.
  5. Perform a compression test to determine if there are any issues with cylinder number 2's compression.

Cost to Fix P1302

The cost of repairing a cylinder number 2 random misfire detected can vary depending on the specific cause of the issue and the type of vehicle. On average, the repair costs can range from $100 to $500, including parts and labor. It's essential to consider that labor rates at auto repair shops can vary, so it's recommended to get a few quotes from different shops to compare prices and ensure a fair estimate.

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Code P1302 Information for Specific Makes

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 P1302 Code

1. What does OBDII code P1302 mean?

P1302 indicates that the engine's second cylinder is experiencing random misfires, often causing rough running and reduced performance.

2. What are the symptoms of a P1302 code?

Common symptoms include engine hesitation, rough idling, reduced fuel efficiency, and possibly the Check Engine Light turning on.

3. What causes the P1302 code?

Causes may include a faulty spark plug, a malfunctioning ignition coil, fuel injector issues, vacuum leaks, or compression problems in cylinder 2.

4. Can I drive with a P1302 code?

Driving with a P1302 code is not recommended as it can lead to engine damage or increased emissions if the misfire persists.

5. How do I diagnose a P1302 code?

Diagnosis involves inspecting spark plugs, ignition coils, fuel injectors, and checking for vacuum leaks or low compression in cylinder 2.

6. How do I fix the P1302 code?

Repairs may include replacing damaged spark plugs, ignition coils, or fuel injectors, fixing vacuum leaks, or addressing compression problems.

7. Will clearing the P1302 code fix the problem?

Clearing the code does not address the underlying issue; the cause of the misfire must be diagnosed and repaired to prevent the code from returning.

8. Can bad fuel cause a P1302 code?

Yes, contaminated or low-quality fuel can contribute to misfires in cylinder 2 and trigger the P1302 code.

9. How much does it cost to repair a P1302 code?

Repair costs vary depending on the issue, ranging from $100 for spark plug replacement to more for major engine repairs like fixing compression problems.

10. Can a dirty air filter cause a P1302 code?

While less common, a dirty air filter may contribute to air-fuel mixture issues that can trigger misfires, including in cylinder 2.

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