what does the P0301 code mean for my BMW 3 Series F30/F31 (2012-2019)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Ignition Coil

1. Remove Engine Cover (if applicable)
   • Use a socket set to remove any fasteners securing the engine cover.
2. Disconnect Ignition Coil Connector
   • Carefully unplug the electrical connector from the ignition coil for cylinder 1.
3. Remove Ignition Coil
   • Use a socket to remove the bolt(s) securing the ignition coil and remove the coil from the spark plug well.
4. Install New Ignition Coil
   • Insert the new ignition coil and secure it with the bolt(s). Torque to manufacturer's specifications (typically around 8-10 Nm).
5. Reconnect Ignition Coil Connector
   • Ensure the electrical connector is firmly attached.

3. Inspect and Replace Spark Plug

1. Remove Spark Plug
   • Use a spark plug socket to carefully unscrew the spark plug from cylinder 1.
2. Inspect Spark Plug
   • Check for signs of wear, fouling, or incorrect gap. Replace if necessary.
3. Install New Spark Plug
   • Set the gap on the new spark plug according to specifications. Install and torque to 25-30 Nm.

4. Test Fuel Injector

1. Inspect Fuel Injector
   • Check for leaks or blockages. Use a multimeter to test the resistance of the injector.
2. Replace if Necessary
   • If faulty, remove and replace the fuel injector for cylinder 1, following manufacturer specifications for installation.

5. Final Checks

• Reconnect the battery and clear the trouble codes using the OBD-II scanner.
• Start the engine and check for any new codes.