Check engine light on. On 1989 accord Lxi

[Hector]

How do I check the codes

[carotman]

Look under the left front seat, from behind. There is a little box there with a plastic tab. Unfold the tab and you will see a red LED that's blinking. These are the codes.

1 long blink = 10
1 short blink = 1

Count the number of blinks and this is your code.