How do you read codes on 1995 Nissan 200sx 1.6 engine?

To read diagnostic trouble codes (DTCs) on a 1995 Nissan 200SX with a 1.6 engine, you need to locate the diagnostic connector under the dashboard near the driver's side. Use a jumper wire to connect terminals 1 and 2 of the connector. Turn the ignition to the "On" position without starting the engine, and the check engine light will begin to blink, indicating the codes. Count the blinks to determine the codes, which you can then look up for specific diagnostic information.