working on a 2000 civic LX, it keeps throwing codes for the O2 sensor heater circuit. switched the O2 sensors with no change, re-wired the circuit itself, still no change.
we are thinking the ECU itself might be bad, but have no way of testing without another ecu to swap out. So if anyone has an ECU for a 1999-2000 civic (the particular car is an LX automatic, but any 99-00 D16 ecu will work) sitting around, or a 99-00 civic that can sit around for a day or two while someone borrows its brain, that would be awesome.