Nistune Forums

The ecu is throwing out the "DTC_EGR Function Code" and "DTC_Read_Headed 02 Sensor"
Im not too suprised that i threw the egr code as i have plugged it but for some reason it keeps popping up when i clear it. Could i possibly just uncheck the feedback where it says EGR System? As for the 02 Sensor code is the code referring to the primary 02 sensor? Im using a obdI ecu in what use to be a obdII ka24de and i just left the secondary 02 sensor disconnected is that why the code is showing?

it could be that the egr solenoid somehow feeds back electrically.. I have noticed that some functions dont report that they are on ulness they are plugged in even if they are mechanically blocked off doesnt matter plugged in is good enough.

As to the 02.. is the o2 you have swinging past the 14.7... i think there are two voltages 0.6v and 0.5 v depending on which one you have.. but it should swing... if the ecu does not detect it swinging it will fault... but if you have no 02 flags on then it wouldnt if cour mixtures are bang on..

I use the simulated narrowband signal from my wideband..

yeah my afr's after warm up are around 14.5-15.1 idle and cruising but there are times when my afrs reach 17s on idle if the cars been sitting. It may just be my wideband sensor. As for 02 sensor flags s14 ecu's dont really have it which is weird. im gonna hook up my secondary o2 sensor to see if it goes away. ill report back.

odd if you go into your fuel maps and press "o" with the flags ticked nothing happens ?

it should

from what i know s14 ecu's tend to not be able to highlight the o2 flags which is weird. If it does highlight it highlights the entire map.

S14 KA24DE and other ECUs with a VE map will have the 'O2' permanently enabled in the fuel map

Not sure for the exact reasoning for this but seems to be because of the VE map making trim adjustments from what I can tell