how to fix the check engine light on my Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather tools and parts required for repair.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool down before proceeding.

2. Address Fault Codes

• If specific fault codes are retrieved (e.g., P0420 for catalyst efficiency), focus on the related components.
• Replace any faulty sensors (e.g., O2 sensors) or components as indicated by the error codes.

3. Inspect and Replace Spark Plugs

• Remove the ignition coil(s) and spark plugs using a socket set.
• Inspect spark plugs for wear; replace if necessary with OEM specifications (usually NGK or Denso).
• Torque new spark plugs to manufacturer specifications (typically around 13 lb-ft).

4. Check and Replace Air Filter

• Open the air filter housing and remove the old air filter.
• Install a new air filter that meets OEM specifications.
• Ensure the housing is sealed properly before closing.

5. Fuel System Inspection

• Use a fuel pressure gauge to check fuel pump pressure; replace the pump if pressure is below specifications.
• Inspect fuel injectors for clogs or leaks; clean or replace as necessary.

6. Reassemble and Reset Codes

• Reassemble any components removed during the inspection.
• Reconnect the battery terminal.
• Use the OBD-II scanner to clear any stored error codes.