Hondata

i think if you use any V under 1.3.9.0 or up V like 3.2
you can not save your calibration from ECU you must use 1.3.9.0

this is before

after swapping relay to constantly off(87 to a/f heater, instead of 87a to a/f heater) the error now no longer appears

both the p1166 and daughter board error has been eliminated

eld disabled

car no longer has cel

Does it give cell warning on your ecu?
What are the voltages on the primary O2 sensor?

the voltages on the primary was measured with multimeter in series with

A6 and A16 = 0.1 mV(with ignition on and fully warm up)

the car had p1166 for heater circuit malifunction and p1298(eld circuit high ...

any one

Hi ...

I have civic ES K24A1 swap...

and I wont tune my car but I have problem with primer O2 sensor its read too hay
I don't no is that something I can fix with tune or something mistake in harness ??

I read a lot and tried anther PO2 from DENSO /

* The original one /
DENSO 234-9005
192400 ...