how to fix P0302 code in my BMW X3 F25 (2011-2018)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety.
• Allow the engine to cool down.

2. Remove Ignition Coil and Spark Plug

• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil.
• Unbolt and remove the ignition coil from cylinder two.
• Use a spark plug socket to remove the spark plug from cylinder two.

3. Inspect and Replace Parts

• Ignition Coil:
  • Inspect the ignition coil for cracks or damage. If defective, replace with a new coil.
  • Torque the ignition coil to manufacturer specifications (usually around 10 Nm).
• Spark Plug:
  • Inspect the spark plug for wear or deposits. Replace if necessary. Ensure proper gap according to manufacturer specifications (typically around 0.7-0.8 mm).
  • Install the new spark plug and torque to manufacturer specifications (around 25 Nm).

4. Check Fuel Injector

• Remove the fuel injector for cylinder two using a fuel injector puller if necessary.
• Inspect the injector for clogs or electrical issues; clean or replace if required.
• Reinstall the injector ensuring correct seating.

5. Reassemble and Reconnect

• Reinstall the ignition coil and reconnect the electrical connector.
• Replace the engine cover.
• Reconnect the battery.