Fuel System Code 43

[Marcus]

So I have a 90 Acura Integra and the red light is flashing on my ECU. It’s flashing 4 times slow and 3 times fast. I understand that means Code 43 and it’s the fuel system. Does anyone have any idea what part of the fuel system that it could be? I don’t want to just changing parts to find out that it wasn’t it.

 

[LJmLee]

but brand new parts would be nice good luck findin the problem tho i honestly have no clue

 

[Marcus]

ok thanks. anyone else got an idea

 

[hgocasca]

I had that issue, it was my o2 sensor.

 

[Marcus]

changed it

 

[BrokenTalon27]

I had that issue, it was my o2 sensor.

Same thing happened to me. The wiring to my O2 sensor broke off somehow and I got that code.


OP, What type of O2 did you use?