my BMW X3 F25 (2011-2018) has a check engine light and low power

Solution

1. Preparation

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

2. Address Fault Codes

• Based on the error codes retrieved from the OBD-II scanner, proceed with the necessary repairs specific to the identified issues (e.g., replace faulty sensors, ignition components).
• Clear the error codes using the OBD-II scanner after repairs.

3. Inspect and Clean Air Intake

• Remove the air intake duct and inspect the air filter; replace if dirty.
• Clean the throttle body with throttle body cleaner to remove carbon deposits.
• Reassemble the air intake system securely.

4. Fuel System Inspection

• Connect the fuel pressure gauge to the fuel rail and check for proper fuel pressure (refer to manufacturer specifications).
• If pressure is low, replace the fuel pump or fuel filter as necessary.
• Ensure all fuel lines are properly connected and free of leaks.

5. Ignition System Replacement

• Remove the ignition coils and inspect the spark plugs; replace any that are worn or fouled.
• Install new ignition coils if necessary, ensuring they are torqued to the manufacturer's specifications.

6. Exhaust System Check

• Inspect the catalytic converter for signs of blockage or damage; replace if necessary.
• Check exhaust manifold and piping for leaks or restrictions.