my Honda Civic 9th Generation (2012-2015) has a check engine light and runs rough

Solution

1. Preparation

• Gather tools and parts before starting the repair.
• Disconnect the negative terminal of the battery to ensure safety.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Multimeter
• Screwdrivers

2. Address Faulty Spark Plugs

1. Remove the engine cover if applicable.
2. Disconnect the ignition coils from the spark plugs.
3. Remove the spark plugs using a spark plug socket.
4. Inspect the spark plugs for wear; replace them if necessary.
5. Torque the new spark plugs to manufacturer specifications (typically 13-15 ft-lbs).

3. Check and Replace Ignition Coils

1. Remove the ignition coils from the spark plug wells.
2. Inspect each coil for cracks or damage.
3. Test each coil with a multimeter for proper resistance.
4. Replace any faulty ignition coils.
5. Reinstall the ignition coils ensuring they are seated properly.

4. Inspect and Replace Air Filter

1. Locate the air intake box and release the clips or screws.
2. Remove the air filter and inspect it for dirt or damage.
3. Replace the air filter with a new one if it is dirty.
4. Reassemble the air intake box securely.

5. Clean or Replace Fuel Injectors

1. Remove the fuel rail according to the manufacturer’s specifications.
2. Inspect the fuel injectors for clogs; clean them with a suitable injector cleaner.
3. If necessary, replace any faulty injectors.
4. Reinstall the fuel rail ensuring proper torque specifications are followed.

6. Test and Clean MAF Sensor

1. Locate the MAF sensor in the air intake system.
2. Disconnect the electrical connector and remove the sensor.
3. Clean the MAF sensor with MAF cleaner spray.
4. Reinstall the sensor and reconnect the electrical connector.