The 4.2 and 4.9 sensors use a different WB module calibration, not compatible electrically.
Surprisingly, the instructions are the same. I wonder if Innovate has different part numbers for the LC-2 modules that come with the 4.2 and 4.9 sensors. If I could find that information on their website, might be worth looking at and seeing if the sensors are compatible with the modules that I have. Hmm. Didn't think about that!
Haven't heard of any widespread issues with the LC-2s, but the LC-1 were trash, died like flies back when they were new, the LC-2 redesign supposedly fixed that.
I did a good amount of searching of online to see if this was a common problem and saw quite a bit of people stating they ran into the problem as well, and the reasoning that forum members gave them ranged from "Need better ground" to "Your wiring is probably poop" to "Innovate sucks balls, get a X brand". Haha.
Satisfied long term user of 14point7.com widebands, so far so good.
I have seen your posts about 14point7. From what I read, some people love his gear, but state that his customer service needs work. The biggest thing I would prefer not to need to do again is to change the cable from wideband to sensor going to a different brand due to the fact that my sensor goes through the stock grommet under the backseat, up through the rear door panel area, through the firewall in the engine compartment and to the passenger side. If I had to change that cable, I would have to pull the entire motor out to get it out. No thanks.
But at the end of the day, I have to do what it takes to make it work.
I will dig into the module part numbers from Innovate to see which ones are to be used with the 4.2 and 4.9 sensors.