why does my Honda Accord Eleventh Generation (2023-present) check engine light keep coming on

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Address Trouble Codes

• Based on the diagnostic codes retrieved, focus on the specific issue indicated (e.g., P0420 for catalytic converter efficiency).
• If the code indicates a faulty sensor, replace that sensor following the specific instructions for the component.

3. Replace Spark Plugs (if misfiring code is present)

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coils from the spark plugs.
• Remove the spark plugs using a spark plug socket and replace them with new ones, ensuring they are gapped correctly (usually 0.044 inches for Honda).
• Reassemble the ignition coils and engine cover.

4. Inspect and Tighten Gas Cap

• Check the gas cap for any cracks or wear.
• Tighten the gas cap securely to ensure it clicks into place.

5. Inspect and Replace Air Filter

• Locate the air filter housing and remove it using a screwdriver or socket.
• Take out the old air filter and inspect it for dirt or blockages.
• Install a new air filter and reattach the housing.

6. Clear Error Codes

• Reconnect the battery.
• Use the OBD-II scanner to clear any error codes from the system.
• Take the vehicle for a short drive to see if the check engine light illuminates again.