i got a 94 hatch w/ b16a3 motor. obd 1. the cel code is just continously 1 blink. not sure if its considered a slow or fast since its just one blink and i have nothing to compare it with. so im thinking its a 1 or 10. my mpg is really bad too. so i think its the code 1 being my o2 sensor. if i were to replace my o2 sensor, i believe my motor is obd2 - obd1... is there any differents with a obd1 o2 sensor and a obd2 o2 sensor? if so which one do i use?

 

Disconnect your map sensor and pull the code. Then youll see what short blinks look like.

 

ok its a fast blink. code 1.. in replacing my o2 sensor, what o2 sensor do i look for? considering my setup if it matters