I have a 91 integra with b16a obd0, I'm new to integras, obd0, and B-series. Check engine light is on, says o2 sensor. I plan to go to nearest autoparts to buy sensor, when they ask me for what car do I just say 91 integra? Or would I have to say another Honda?

 

You mean you get a Code 1?

Is the O2 sensor generating fluctuating voltage? Did you check with a multimeter? These cars don't generally turn on the CEL unless voltage disappears or flatlines at .45V.

Is the ECU original to the car, or did you swap it for the one that goes with the B16?

If you just want to blow money on parts instead of troubleshooting, ask for a sensor for an '86-'89 Integra. They also had the B16 with a single-wire sensor.

 

1 Heated Oxygen Sensor (HO2S)

It has a p30

I took it to a shop and they said it needed the sensor