AutoCodes – Generic – P1302

P1302 Code - Cylinder Number 2 Random Misfire Detected

Quick Answer

P1302 indicates Cylinder Number 2 Random Misfire Detected. Common causes include Check primary and secondary ignition, Check fuel system-Fuel pressure and injector, Check for 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 Check primary and secondary ignition, Check fuel system-Fuel pressure and injector, Check for 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.

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Code Popularity 28,123

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 Sep 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1302 Description

OBDII Code P1302 - Cylinder Number 2 Random Misfire Detected - AutoCodes.com — P1302 Code - Cylinder Number 2 Random Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P1302?

Check primary and secondary ignition
Check fuel system-Fuel pressure and injector
Check for vacuum leaks
Check engine mechanical condition
Faulty Spark Voltage Detection Module

How to Fix the DTC P1302?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1302 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 P1302 code?

Need more information on how to fix the P1302 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1302 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1302 Acura — Cylinder Number 2 Random Misfire Detected
P1302 BMW — Misfiring Cylinder 2
P1302 Ford — Boost Pressure Pressure Low
P1302 Honda — Cylinder Number 2 Random Misfire Detected
P1302 Hyundai — TDC Sensor Low Input
P1302 MINI — Misfiring Cylinder 2
P1302 Saab — Cylinder 2 Misfiring Detected

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.