how to fix P0301 misfire in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle’s high-voltage battery for safety.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Noid light (optional)
• Safety gloves and goggles

2. Replace Spark Plug

• Sub-steps:
  1. Locate the spark plug for cylinder 1 (usually near the front of the engine).
  2. Remove the ignition coil by disconnecting the electrical connector and unscrewing any bolts.
  3. Unscrew the spark plug using the socket and ratchet.
  4. Inspect the old spark plug for damage, and ensure the new spark plug is correctly gapped.
  5. Install the new spark plug and torque it to the manufacturer's specifications (usually around 15-20 lb-ft).
  6. Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil

• Sub-steps:
  1. If necessary, remove the ignition coil from cylinder 1 as described in the previous step.
  2. Install the new ignition coil and ensure it is seated correctly.
  3. Reconnect the electrical connector to the ignition coil.

4. Check Fuel Injector

• Sub-steps:
  1. If the fuel injector is suspected, remove it according to the service manual.
  2. Inspect the injector for clogs or damage.
  3. If faulty, replace the fuel injector with a new unit.
  4. Reinstall the fuel injector and ensure all connections are secure.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1 to access the cylinder.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare the reading against manufacturer specifications. If low, further diagnosis may be necessary.