my Tesla Model 3 Highland (2024-present) has a check engine light and I'm getting P0301 what should...

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, multimeter, compression tester, torque wrench, fuel injector cleaner.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative terminal of the battery to ensure safety.

2. Inspect and Replace Spark Plug

• Step 1: Remove the engine cover (if applicable) using a socket set.
• Step 2: Locate the spark plug for cylinder 1 (usually found near the engine's top).
• Step 3: Disconnect the ignition coil connector.
• Step 4: Remove the ignition coil using the socket set.
• Step 5: Unscrew the spark plug using a spark plug socket.
• Step 6: Inspect the spark plug for signs of wear (fouling, damage, etc.). Replace if necessary with a new spark plug, ensuring it matches the manufacturer’s specifications.
• Step 7: Reinstall the ignition coil and reconnect the connector. Replace the engine cover.

3. Inspect and Replace Ignition Coil

• Step 1: If the spark plug is fine, test the ignition coil using a multimeter for resistance. Check manufacturer specifications for acceptable values.
• Step 2: If the coil is faulty, replace it with a new ignition coil designed for the Tesla Model 3.
• Step 3: Reconnect the ignition coil and ensure it is seated properly.

4. Check Fuel Injector

• Step 1: Remove the fuel injector connector for cylinder 1.
• Step 2: Use a multimeter to test the injector's resistance following manufacturer specifications.
• Step 3: If the injector is faulty, replace it with a new fuel injector.
• Step 4: Reconnect the fuel injector and ensure secure connections.

5. Compression Test

• Step 1: Insert the compression tester into the spark plug hole for cylinder 1.
• Step 2: Crank the engine several times to get a stable reading.
• Step 3: Compare the reading to manufacturer specifications. Low compression indicates possible internal engine problems.