how to fix P0301 misfire code on Tesla Outback 5th Generation (2015-2019)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, compression gauge, fuel injector tester, basic hand tools
• Clear the error codes from the vehicle’s ECU after diagnosis.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket wrench.
  2. Disconnect the ignition coil connector from cylinder 1.
  3. Remove the ignition coil using the socket set.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the old spark plug for signs of wear or fouling.
  6. Install a new spark plug, ensuring it is gapped correctly to manufacturer specifications.
  7. Reinstall the ignition coil and connect the electrical connector.

3. Replace Ignition Coil

• Sub-steps:
  1. If the ignition coil is faulty, remove it from cylinder 1 as described in the previous step.
  2. Install the new ignition coil, ensuring it is securely seated.
  3. Reconnect the ignition coil connector.

4. Test Fuel Injector

• Sub-steps:
  1. Detach the fuel injector connector for cylinder 1.
  2. Connect a noid light to the fuel injector connector to check for signal.
  3. If the noid light does not flash, the injector may be faulty; replace it.
  4. If the injector is functional, proceed to check for clogs or fuel delivery issues.
  5. Reconnect the fuel injector connector.

5. Perform Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression gauge into the spark plug hole.
  3. Crank the engine for a few seconds and record the compression reading.
  4. Compare the reading to manufacturer specifications; if low, further engine diagnostics may be needed.
  5. Reinstall the spark plug if no issues are found.