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Home/Cars/Subaru/Outback/5th Generation (2015-2019)/my Tesla Outback 5th Generation (2015-2019) has a P0302 code what could be wrong

my Tesla Outback 5th Generation (2015-2019) has a P0302 code what could be wrong

Subaru Outback 5th Generation (2015-2019)

Severity: highDifficulty: mediumError Code: P03022-4 hours
3 min read
596 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 Tesla Outback. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0302
Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect battery before working on electrical components.
  • ⚠Allow engine to cool before inspecting or replacing components.

Symptoms

  • •Check engine light illuminated
  • •Rough idle
  • •Decreased acceleration performance
  • •Increased fuel consumption
  • •Engine vibrations or shaking

Diagnostic Steps

  1. 1Scan for additional error codes using an OBD-II scanner to check for related misfire or engine issues.
  2. 2Inspect the spark plug in cylinder 2 for wear or damage.
  3. 3Check the ignition coil for cylinder 2 for proper operation and any visible damage.
  4. 4Verify fuel injector operation in cylinder 2 by performing a fuel injector balance test.
  5. 5Conduct a compression test on cylinder 2 to assess the internal engine health.
  6. 6Inspect vacuum lines and intake manifold for any leaks that could affect cylinder 2 performance.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the negative battery terminal to ensure safety during repairs.

2. Replace Spark Plug

  • Remove the engine cover if applicable using a socket set.
  • Disconnect the ignition coil connector and remove the ignition coil from cylinder 2 by unbolting it.
  • Use a spark plug socket to remove the spark plug from cylinder 2.
  • Inspect the new spark plug to ensure it is gapped correctly according to manufacturer specifications.
  • Install the new spark plug and torque it to the recommended value (typically around 13-15 lb-ft).
  • Reinstall the ignition coil and reconnect the connector.

3. Check/Replace Ignition Coil

  • If the spark plug replacement did not resolve the issue, visually inspect the ignition coil for signs of damage or wear.
  • If needed, replace the ignition coil by disconnecting it, removing the mounting bolts, and installing the new coil.
  • Torque the coil bolts to the specified value.

4. Inspect Fuel Injector

  • If misfire persists, remove the fuel rail to access the fuel injectors.
  • Remove the fuel injector from cylinder 2 by detaching the electrical connector and using a wrench to unbolt it.
  • Clean the injector using a specialized injector cleaner or replace it with a new one.
  • Reinstall the injector, ensuring a proper seal, and reattach the fuel rail.

5. Perform Compression Test

  • If the issue still exists, perform a compression test on cylinder 2 using a compression tester.
  • Remove the spark plug and insert the tester, then crank the engine to take a reading.
  • Compare the result to manufacturer specifications (typically between 120-180 psi for most engines).
  • If compression is low, further investigation is needed for piston rings or valve issues.

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
  • Compression tester
  • Fuel injector cleaning kit

Parts Required

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

Additional Information

Error CodeP0302
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

5 items

Parts

3 items

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