Constant 02 sensor codes

[RevGTO]

Well, I got it wired up on Friday and installed it. Threw insufficient activity and low heater function codes after a day. Scanned and it showed no activity on that sensor.

I wired the two white wires to C & D (heater power and ground), black to B (signal high) and gray to A (signal low) - according to the image in the post by Mr. Prick above.

I pulled it tonight and re-checked my connections. Any other ideas?

[The Alchemist]

So you have a good power supply on the heater power wire??? A good earth?
When you scan the o2voltage with efilive does it show any activity at all of just sit on 450mv. Bearing in mind the ecu sends a base 450mv on that sensor high line with very low amps until the o2 starts switching and overrides it......with its own stronger signal

[RevGTO]

No, no activity when I scan. I drove it around and the bank 2 sensor was switching but the bank 1 sat on 447mv or something like that.

Stock sensor was switching and so is the Denso I have in there now.

I redid the connections on one side ... they appeared fine but I checked them and redid them anyway. When I get around to it, I'll reinstall and test.

If it's still dead, that must mean it's wired wrong. Or that this particular sensor is not compatible with my car ... but if it's four wire, it should be compatible, right?

[ssvolvo]

Check the for open/shorted wiring ALL THE WAY BACK to the ECM.

[RevGTO]

Check the for open/shorted wiring ALL THE WAY BACK to the ECM.

Like I said, I have a Denso sensor in there now and it is working (throwing code for insufficient switching, but working). The problem is clearly with the Bosch sensor wiring.

[The Alchemist]

yes it sounds like the wiring to me... as I run them in cars here in NZ and they work fine > Mike

Like I said, I have a Denso sensor in there now and it is working (throwing code for insufficient switching, but working). The problem is clearly with the Bosch sensor wiring.

[RevGTO]

Funny you'd post right at this moment ... I redid my connections, tested for conductivity, and reinstalled it just a little while ago. No activity. As I posted above, I connected the two whites to C&D, the black to B, and the gray to A as directed in the post by ssvolvo.

Somehow this isn't right but there's no way of knowing now besides randomly swapping the connections around. I just can't find any information about it over here; talking to Bosch has been a joke.