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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's 12V battery to ensure safety during repairs.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover (if applicable) to access the spark plug.
• Unscrew the spark plug from cylinder 1 using the spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage.
• Replace with a new spark plug that meets OEM specifications. Torque to the manufacturer's recommended value.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts.
• Inspect the ignition coil for cracks or damage.
• Replace the ignition coil with a new unit if any defects are found.
• Reinstall the ignition coil and secure it with the retaining bolts.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, multimeter.
• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the injector's resistance; compare it to the specifications.
• If the injector is faulty, remove it and replace it with a new one.
• Reconnect the injector connector after replacement.

5. Reconnect Battery and Clear Codes

• Reconnect the 12V battery.
• Use the OBD-II scanner to clear any fault codes and reset the check engine light.