Hello all,

I've been chasing a p0057 (o2 sensor heater circuit low voltage) service engine soon light for awhile now. I've narrowed it down to either the ECU or the harnesses it self. My car is a 2003 Maxima SE automatic.

I was wondering if I can use the harness from an automatic 2002 or 2003 Maxima despite the model trim (GXE, GLE) without any issues. I will be purchasing an A56T63ZP4 ecu with immobilizer and key on ebay, hoping that it will solve my issue which is why I am looking into harnesses as well just so I have everything ready to drop in at once.

Thanks.

 

By "chasing" how have you been doing that? Change the sensor? Seems a little rash to blame an O2 code to change the entire harness or even ECU.

 

I'm curious to know why you're condemning the harness or entire ECU for an O2 sensor code. Perhaps the sensor itself is bad...?