what does it mean when my Tesla Outback has a P0301 code?

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, spark plug wrench, multimeter, compression tester.
• Safety Warnings: Disconnect the battery before working on electrical systems and allow the engine to cool before inspection.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for Cylinder 1.
• Remove the ignition coil bolts and take out the ignition coil.
• Use a spark plug wrench to remove the spark plug from Cylinder 1.
• Inspect the old spark plug for signs of wear. Install a new spark plug, ensuring it is gapped correctly (typically .028-.060 inches for most engines).
• Reinstall the ignition coil and reconnect the connector.

3. Test and Replace Ignition Coil (if necessary)

• Use a multimeter to test the resistance of the ignition coil for Cylinder 1.
• If it is out of specification, replace the ignition coil with a new one.
• Reinstall the ignition coil and reconnect the wiring.

4. Check and Clean Fuel Injector

• Use a fuel injector cleaning kit to clean the injector for Cylinder 1.
• If cleaning doesn’t resolve the issue, replace the fuel injector with a new one.

5. Perform Compression Test (if symptoms persist)

• Remove the spark plug and insert the compression tester into Cylinder 1.
• Crank the engine and record the compression reading.
• If the compression is low, further engine diagnostics may be necessary (e.g., valve issues, head gasket failure).