how to resolve P0301 misfire code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety during repairs.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plugs

• Tools Required: Socket set, torque wrench, gap gauge
• Remove the engine cover if necessary.
• Use a socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of wear or fouling. If damaged, replace it with a new spark plug.
• Ensure the new spark plug is gapped correctly according to manufacturer specifications (typically around 0.028 inches).
• Reinstall the spark plug and torque it to the specified value (usually around 20 Nm).

3. Check and Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts.
• Inspect the ignition coil for any signs of damage or wear.
• If necessary, replace the ignition coil with a new one.
• Reinstall the ignition coil and torque it to the manufacturer's specifications.

4. Fuel Injector Inspection and Cleaning

• Tools Required: Fuel injector cleaning kit (if needed)
• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel injector using the appropriate tools.
• Inspect the injector for clogs or damage. If clogged, clean or replace it as needed.
• Reinstall the injector and reconnect the connector.

5. Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine for a few seconds and record the compression reading.
• Compare the reading to the manufacturer’s specifications. If low, further diagnostic may be needed to assess internal engine issues.