why does my Tesla Outback 4th Generation (2010-2014) have a check engine light with code P0302

Solution

1. Preparation

• Gather tools and ensure the vehicle is parked on a level surface.
• Disconnect the negative terminal of the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Sub-steps:
  • Remove the engine cover (if applicable) using a socket set.
  • Disconnect the ignition coil connector for cylinder 2.
  • Remove the ignition coil using a socket wrench.
  • Remove the spark plug using a spark plug socket.
  • Inspect the spark plug for wear; replace if necessary (use OEM specifications).
  • Install the new spark plug, torquing to the manufacturer’s specification (typically around 13-15 lb-ft).
  • Reinstall the ignition coil and its connector.

3. Check and Replace Fuel Injector

• Sub-steps:
  • Disconnect the fuel injector connector for cylinder 2.
  • Remove the fuel rail (if necessary) to access the injector.
  • Inspect the injector for clogs or damage and replace if needed (ensure proper seating and orientation).
  • Reassemble the fuel rail and reconnect the fuel injector.

4. Compression Test

• Sub-steps:
  • Remove the spark plug for cylinder 2.
  • Insert the compression tester into the spark plug hole.
  • Crank the engine several times to take a reading.
  • Compare the reading to manufacturer specifications; if low, further investigation into the engine internals may be required.

5. Inspect for Vacuum Leaks

• Sub-steps:
  • Visually inspect the intake manifold and vacuum hoses for signs of wear or damage.
  • Use a smoke machine or carburetor cleaner to detect leaks while the engine is running.
  • Repair any identified leaks and clear any codes from the ECU.