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Home/Cars/Skoda/Octavia/NFL (2020-Present)/how to fix P0302 cylinder 2 misfire in Skoda Octavia NFL (2020-Present)

how to fix P0302 cylinder 2 misfire in Skoda Octavia NFL (2020-Present)

Skoda Octavia NFL (2020-Present)

Error Codes
Severity: highDifficulty: mediumError Code: P03022-4 hours
3 min read
555 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0302 cylinder 2 misfire in Skoda Octavia NFL. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0302
Affected Component
Engine
Estimated Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before opening any components to prevent burns.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or engine shaking
  • •Decreased engine power
  • •Increased fuel consumption
  • •Engine stalling during acceleration
  • •Poor acceleration response

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm P0302 and check for any additional codes.
  2. 2Inspect spark plug condition in cylinder 2 for wear or damage.
  3. 3Check ignition coil functionality by swapping it with another cylinder and observing for changes in misfire codes.
  4. 4Perform a compression test on cylinder 2 to assess engine health and check for mechanical issues.
  5. 5Inspect fuel injector operation by performing a fuel injector balance test or using a noid light.
  6. 6Examine vacuum lines for leaks that could affect air-fuel mixture.
  7. 7Check the engine’s wiring harness and connectors related to the ignition system for faults.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the battery to ensure safety.
  • Allow the engine to cool if it has been running.

2. Inspect and Replace Spark Plug

  • Remove the ignition coil from cylinder 2.
  • Use a spark plug socket to remove the spark plug.
  • Inspect the spark plug for wear or fouling; replace if necessary.
  • Torque the new spark plug to the manufacturer's specifications (typically around 20 Nm).

3. Check and Replace Ignition Coil

  • If the spark plug is fine, test the ignition coil by swapping it with another cylinder.
  • If the misfire follows the ignition coil, replace it with a new one.
  • Ensure proper seating and connect electrical connectors securely.

4. Inspect and Replace Fuel Injector

  • Remove the fuel rail to access the fuel injector for cylinder 2.
  • Check the fuel injector for clogs or electrical issues.
  • Replace the injector if it is not functioning properly.
  • Reinstall the fuel rail ensuring proper sealing with new O-rings.

5. Perform Compression Test

  • If misfire persists after replacing spark plug and ignition coil, perform a compression test.
  • Ensure that cylinder 2 has compression within the specifications (typically 150-200 psi).
  • If compression is low, further diagnosis may be needed for potential internal engine repairs.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •OBD-II scanner
  • •Socket set
  • •Torque wrench
  • •Spark plug socket
  • •Compression tester
  • •Noid light or fuel injector tester

Parts Required

  • •Spark plug (for cylinder 2)
  • •Ignition coil (if faulty)
  • •Fuel injector (if faulty)

Additional Information

Error Code
P0302
Affected Component
Engine
Estimated Time
2-4 hours
Difficulty
medium
Severity
high
Tools Required
6 items
Parts Required
3 items

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