1. Turn off the engine and allow it to cool down.
2. Open the hood of your Accord.
3. Locate the two-pin "Service Check Connector" under the hood, near the driver's side strut tower. It's usually covered with a black cap.
4. Remove the cap from the connector.
5. Take a jumper wire or a thin piece of metal, and insert one end into the left terminal (labeled "S") of the connector, and the other end into the right terminal (labeled "T").
6. Turn the ignition key to the "ON" position (but don't start the engine). The check engine light will begin to flash.
7. Count the number of flashes, with a short pause indicating a digit, and a longer pause indicating a separation between digits. For example, if the check engine light flashes 3 times, pauses, then flashes 2 times, the trouble code is 32.
8. Write down the trouble codes that appear.
9. Turn off the ignition key.
10. Remove the jumper wire from the connector and replace the cap.
11. Start the engine and verify that the check engine light stays off.
The trouble codes that you have retrieved can provide you with more information about the underlying issue causing the check engine light to come on. You can then refer to a trouble code chart or manual specific to your Accord to interpret and diagnose the problem.
