I bought a ZT-2 in the group buy here a few months ago and it has been working flawlessly until today.
I went for a drive this morning, all was going well until the display went to full scale (21) a few times, but it seems to be a permanent condition now.
If i disconnect the sensor while the laptop is logging, the reading goes from 21.0 to 14.5 instantly, and returns to 21 as soon as the sensor is reconnected.
I am guessing my sensor is dead, as everything else appears to be working.
Are there any tests I can do with a multimeter to confirm the sensor is dead?
I am surprised by its short lifespan. I never use fuel additives, and I have never run the motor with the sensor not powered up.

Any thoughts?

Who's the best supplier of the LSU sensor these days?

 

Your sensor shouldn't be shot yet. The only thing I can think of is the placement of the O2. Zt says you should mount the sensor in the 10 to 2 o'clock postion to keep moisture from settling in the sensor. I guess it shortens the sensors life or completely messes with it.

 

Yeah, I'm aware of that requirement, it's at 12 o'clock..
I'll do some more testing in the morning, might have a dud connection somewhere....

 

Also exhaust leaks will throw it off a lot... My o2's are after the collectors and sometimes the thing will read ridiculously high even when theirs no audible leaks.

On mine when their's a collector leak the WB will read ridicously high, but when you go WOT the readings will drop to about where they should be.