how to fix P0303 misfire code in Tesla Outback 6th Generation (2020-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Locate the spark plug for cylinder 3.
  3. Use a socket to remove the spark plug.
  4. Inspect the spark plug for signs of wear or fouling.
  5. If damaged, replace it with a new spark plug, ensuring it matches OEM specifications.
  6. Torque the spark plug to the manufacturer's specification (typically around 15-20 ft-lbs).

3. Check and Replace Ignition Coil

• Tools Required: Socket set
• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil for cylinder 3.
  2. Remove the ignition coil by unscrewing any retaining bolts.
  3. Test the ignition coil's resistance using a multimeter (refer to the specifications in the service manual).
  4. If faulty, replace the ignition coil with a new one.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, safety goggles
• Sub-steps:
  1. Remove the fuel rail to access the fuel injector for cylinder 3.
  2. Disconnect the injector's electrical connector.
  3. Remove the fuel injector from the rail.
  4. Clean the injector using a fuel injector cleaner per the manufacturer's instructions.
  5. Reinstall the injector and reconnect the electrical connector.

5. Perform Compression Test

• Tools Required: Compression tester
• Sub-steps:
  1. Remove the spark plug from cylinder 3.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare the reading to the manufacturer's specifications.
  5. If readings are low, further investigation into mechanical issues may be required.