how to fix P0303 misfire code on Tesla Outback 4th Generation (2010-2014)?

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Locate the spark plug for cylinder 3 (refer to the service manual for cylinder location).
  3. Use a spark plug socket to remove the old spark plug.
  4. Inspect the spark plug for wear; replace if it shows signs of fouling or damage.
  5. Install a new spark plug, ensuring it is gapped correctly (refer to specifications).
  6. Torque the spark plug to the manufacturer’s specifications.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Disconnect the connector from the ignition coil for cylinder 3.
  2. Remove the ignition coil using appropriate tools (usually a socket or ratchet).
  3. Install the new ignition coil, ensuring it seats properly.
  4. Reconnect the electrical connector securely.

4. Test Fuel Injector

• Sub-steps:
  1. Locate the fuel injector for cylinder 3.
  2. Disconnect the wiring harness from the injector.
  3. Use a multimeter to test the injector's resistance (refer to specifications for correct values).
  4. If the injector is faulty, replace it with a new one.
  5. Reconnect the wiring harness once the new injector is installed.

5. Perform Compression Test (if necessary)

• Sub-steps:
  1. Remove the spark plug for cylinder 3.
  2. Insert the compression gauge into the spark plug hole.
  3. Crank the engine and note the compression reading.
  4. Compare the reading to manufacturer specifications; if low, further diagnostics may be needed.