Quote:
Originally Posted by steve99
Only guessing here but seem to remember reading the second o2 sensor was only to monitor header CAT efficiency and pop up cel code. Don't Ecutek guys hijack that sensor input for wideband fail safe, think the OFT guys also setting up a wideband on this input as well that can be read by oft, but if I understand it correctly it just monitored by oft by reading ram address in ecu.
It would appear you may need and ecu code patch to actually do something with the input data.
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Yes on ecutek we can use it as an input. However in factory form there is a fuel trim compensation for rear o2. I have a local who has a problem and is getting DTC's that I have resolved by setting these values to 0 from -0.5 / 0.5 (factory values). The oem ecu uses these values to apply minor fuel trims. I never tested to what extent it will trim through, its a bit of a PITA to test something like that!