how to fix misfire code P0301 in Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to prevent electrical shock.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Multimeter

2. Inspect and Replace Ignition Coil

1. Locate the ignition coil for cylinder 1 (refer to the vehicle's service manual for location).
2. Remove the engine cover if necessary.
3. Disconnect the electrical connector from the ignition coil.
4. Unbolt the ignition coil using a socket wrench and remove it from the cylinder head.
5. Install the new ignition coil by reversing the removal steps.
6. Torque the ignition coil bolts to the manufacturer’s specifications.

3. Inspect and Replace Spark Plug

1. Remove the ignition coil again if it was replaced.
2. Use a spark plug socket to remove the spark plug from cylinder 1.
3. Inspect the spark plug for wear, gaps, and fouling. Replace if necessary.
4. Install a new spark plug, ensuring the gap is set to specifications.
5. Torque the spark plug to the manufacturer's specifications.

4. Compression Test (if necessary)

1. Insert the compression tester into the spark plug hole for cylinder 1.
2. Crank the engine for a few seconds to take a reading.
3. Compare the compression reading to the manufacturer's specifications.
4. If the compression is low, further diagnostics may be necessary to assess piston rings or valve issues.

5. Verify Fuel Injector Functionality

1. Locate the fuel injector for cylinder 1.
2. Check the injector wiring for any signs of damage or corrosion.
3. If needed, use a multimeter to test the injector's resistance and operation.
4. Replace the fuel injector if found faulty.