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Fixed please close if neccesary

My prelude is thowing a code 12, I have a jdm B20A motor using a USDM intake with EGR. Anyone had this ecu code before with a jdm swap? And how did you guys fix it? All help is appreciated.

Got the O2 sensor working, i was not getin any power through the 2 black heater wires when i was measuring voltage. I have one of the black wires going to A6 (heater gnd) and then the other black wire i wired to A25 to supply the power when the ignition is turned I have no more code 41, and...

whats limp mode?? thanks for the help guys... i really apprecialte this.. i hate these sorts of problems... all the complicated stuff was done! Just this on thing i need your help on!

Im running a PK3 ecu which is 90-91 prelude... after everything is all sorted out and no engine lights, then im running a PR4 ecu... i hooked up the other ecu as i was curious.. but still got an engine light with that one too I have an a/f guage ( i know not the most accurate haha) but i got a...

Hmm... i just have the one O2 sensor though :( I have attempted to fix it a few times.. almost giving up as i just bought a brand new OEM o2 sensor.. i Just need it fixed so i can get it tuned! Its been like 8 months now.. its killing me lol This is the one last thing from the major...

Just curious... i have done a obd0 to obd1 swap in my 89 prelude with a b20a. The car originally was obd1 and is now obd2 with the new motor. I have a ecu conversion harness for the new obd1 ecu. I am having problems with code 41, (heater circuit) The new motor has a single, 4 wire o2...