Thread: Wacky O2 sensor

I'm guessing my O2 sensor is going out? It just keeps on swaying back and fourth in ECU talk. Any brand of sensor I should stay away from?

YouTube - Wacky front O2

That is pretty good, however, I don't see it reach 0 or 100 at all. I'm not sure if this means anything, for speed, it is fast enough.

You happen to know if it is an original one? I just have gotten the original NTK. However, within America there is a good Bosch o2 4 wires so you can rule out the grounding on the catalyzer. It comes cheap. That cheap, they won't ship it to Europe.

It is so silly, Bosch overhere actually can't tell by American part number what to get, but they recommended their €160 4 wire while you only pay $60.

Look for that 4 wire o2 thread, I didn't bookmark it.

Looks alright to me.

Dave

It's working like intended for a Narrow Band O2 sensor. Narrow Band O2 sensors can only read AFR's at 14.7. It just knows that you are above or below the 14.7 essentially.

O2 sensors give out a certain voltage depending on the Air to fuel ratio, this voltage is then translated to an actual AFR if you have a wideband, but on a narrow band it's translated to simple Rich or Lean (below 14.7 or above 14.7).

When you drive normally, not WOT, it will constantly go from rich to lean to rich trying to keep you at 14.7 AFR. Nothing to worry about