what does the P0301 code mean for my BMW 3 Series G20/G21 (2019-2024)

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Use a socket wrench to remove the spark plug from cylinder 1.
• Inspect the old spark plug for signs of fouling or damage.
• Install the new spark plug, tightening it to the manufacturer’s specified torque (typically around 20-25 Nm).
• Reattach the ignition coil.

3. Inspect/Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the ignition coil using a socket wrench.
• Install a new ignition coil in the reverse order of removal, ensuring it is seated correctly.
• Reconnect the electrical connector.

4. Clean or Replace Fuel Injector

• If the fuel injector is clogged, remove it for cleaning or replacement.
• Use a fuel injector cleaning kit if cleaning, or install a new fuel injector if necessary.
• Ensure all seals are replaced and properly seated to prevent leaks.

5. Reassemble and Test

• Reinstall any components removed during the process, such as the engine cover.
• Reconnect the negative battery terminal.
• Start the engine and let it idle, checking for any irregularities.