well my check engine light is on and saying that i need to replace my o2 at the header. i have dc header and n1 exhaust. i was wondering whats better to get a oem sensor or wideband. i dont really understand the wideband so if someone could explain that to me, does it just connect to something like a vacf?

if i get a wideband does the vafc work with it?

 

The OEM 4-wire O2 sensor will output a signal if you put it in a benchvise and wave a torch over the thimble.

A wideband O2 sensor NEEDS a controller box to control its operation and make sense of its output.

O2 sensors measure oxygen content. You use the wideband to measure changes that you make with the AFC.

Just get an OEM O2 sensor.

 

So if I'm going turbo and have an A/F gauge, I need a wideband 02 sensor correct? My downpipe has 2 bungs near the top, the first one is for my OEM o2 sensor and the second one if for the wideband, right? If this is the case, how do I go about connecting the A/F gauge to the wideband? Or can I just use the OEM o2 for the A/F gauge? (I dont believe so)

 

Manufacturers make A/F gauges which only take the OEM O2 sensor output and display it....like Autometer, for example. These displays won't do much if you try and connect a WB O2 up to it.

Again, the WB O2 needs a controller box. The controller box outputs a linear DC voltage. The WB kit might have come with it's own display or not. But if you try and connect up an A/F gauge that was meant for a standard O2 sensor, it just won't make sense and won't display things correctly. The standard O2 sensor outputs a 0-1v signal where-as the WB O2 usually spits out a 0-5v signal making the standard O2 display useless.

So to answer your Q, if your A/F gauge is a standard type, then don't try connecting it to a WB O2.