Well to make it short, i have a 93 EG hatch (cx model) with a mini-me swap on it. D15B8 Block and D16Z6 Head. I got a CEL with 2 hard codes. O2 Sensor Heater Circuit 41, and i got also a IAT sensor circuit cant remember the number. I was reading that the IAT sensor and O2 Sensor wiring is in the same circuits somewhere within the engine harness. both codes as soon as i clear the battery and i start the car the light comes on HARD...... Im still using the CX Harness on my car, and i can use my vtec due to the CEL Problem. Please any help... The O2 Sensor Is brand new as well is the IAT Sensor. Anyhelp would be greatfull...........................

 

If you replaced the components and the light still indicates those codes, you have a wiring problem with those two sensors to the PCM.... Check your wiring.

 

do you think that i should just buy a engine harness for a 92-95 civic ex/si better off than using the civic cx engine harness.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Radyjr &raquo;</TD></TR><TR><TD CLASS="quote">do you think that i should just buy a engine harness for a 92-95 civic ex/si better off than using the civic cx engine harness.</TD></TR></TABLE>

wouldnt be a bad idea, also if your computer is chipped check and make sure the chip didnt come loose, that can cause some weird stuff to happen.

 

the ecu that iam using is a stock p28 ecu non chipped

 

Use the harness that your car has in it, and modify it to accommodate the extra sensors, it is a nightmare to diagnose an electrical problem on any car that has had a huge portion of the harness replaced to simply accommodate the extra sensors. If the sensors are new, you have a wiring problem, check your pinouts and make sure there is continuity between your sensors and the PCM.