O2 sensor ohm question.

[Angry7M]

So I'm getting a code 25 running lean, I've tested fuel pressures and they all seem to be within spec, even with the FPR hose disconnected. I replaced my O2 sensor like 5 months ago, its a Denso 3 wire universal O2 sensor that I bought at Autozone. And I just measured the resistance like it says in the TSRM. Its suppose to be 3.0-3.6 ohms and I got 6.7 ohms with the engine cold. So can this make my engine run Lean at WOT? And regular driving? Or is there another way of testing it?
Thanks
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=121

 

[grimreaper]

wot= no input from o2 sensor so no.
The heater circuit is out of range is what the ohms are telling you.
If the ecu is telling you its lean it has maxed out the fuel trims with the range it has and cant add enough fuel to keep things in check. Check for vac leaks, exhaust leaks (skewed o2 readings) and go from there.

Also check the actual o2 sensor readings themselves per the tsrm and then what the VF reading is to see what the ECU is doing. Oh and the TSRM has a diag. page that will guide you along the factory diag.process for running lean as well.