how to fix P0301 misfire code 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 required tools and parts.
• Disconnect the vehicle's battery to prevent electrical shorts (negative terminal first).
• Allow the engine to cool if recently operated.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 1 and remove the ignition coil.
• Unscrew the spark plug using the spark plug socket and inspect it for wear or fouling.
• If damaged, replace it with a new spark plug (ensure it matches OEM specifications).
• Torque the new spark plug to the manufacturer's specified value (typically around 15-20 lb-ft).
• Reinstall the ignition coil and engine cover.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil appears damaged or has high resistance, remove it.
• Replace it with a new ignition coil that matches OEM specifications.
• Reconnect the ignition coil to the spark plug and ensure it clicks into place.

4. Check Fuel Injector

• Use a noid light to check the injector pulse for cylinder 1.
• If the injector is not firing, replace it with a new fuel injector.
• Reconnect the injector harness and ensure a secure fit.

5. Perform Compression Test (if necessary)

• If previous steps do not resolve the issue, perform a compression test on cylinder 1.
• If compression is low, further investigation into potential internal engine issues (valve or piston damage) may be necessary.