what does it mean when my Tesla Model 3 Original (2017-2023) has a P0301 code?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal for safety.

2. Inspect and Replace Spark Plug

• Remove Engine Cover: Use a socket set to unbolt and remove the engine cover.
• Remove Spark Plug: Use a spark plug socket to carefully remove the spark plug from cylinder 1.
• Inspect Spark Plug: Check for fouling, wear, or damage. Replace if necessary.
• Install New Spark Plug: Torque to manufacturer specifications (typically around 13 lb-ft for Tesla).

3. Check and Replace Ignition Coil

• Remove Ignition Coil: Unplug the connector and unscrew the ignition coil from cylinder 1.
• Inspect Ignition Coil: Check for cracks or burns. Replace if necessary.
• Install New Ignition Coil: Secure the new coil and reconnect the electrical connector.

4. Test Fuel Injector

• Remove Fuel Injector Connector: Unplug the connector from the fuel injector for cylinder 1.
• Test Injector Operation: Use a multimeter to check for the correct voltage and resistance.
• Replace Injector if Faulty: If the injector is not functioning, replace it with a new one.

5. Perform Compression Test

• Remove Spark Plug Again: Use the spark plug socket to remove the spark plug from cylinder 1 once more.
• Insert Compression Tester: Install a compression tester in the spark plug hole.
• Crank Engine: Crank the engine to obtain a compression reading. Compare to manufacturer specifications (typically 150-200 psi).
• Address Compression Issues: If compression is low, further investigation may be required for valve or head gasket issues.