Well I followed the directions on getting the code=0512, none of the post regarding codes has this code listed. I checked it twice to make sure I read the blinking CHECK ENGINE SOON light.....HELP PLEASE

 

According to the Haynes manual, check code 0512 is a P0140 or Downstream sensor high voltage Fault. That could be a problem with the O2 sensor located behind the Cat converter. The sensor is $75 from Courtesy nissan. I know, Ijust replaced mine yesterday! Good Luck.

 

i have a cali spec 99 i think i have like 4 sensors which one would it be i have been getting this code too.

 

You should only have 1 sensor behind the catalytic converter(on the side nearest to the tailpipe. That is the one. I have a fed spec 99 and only have 3 sensors total. 2 stick in the y-pipe and one behind the converter.

 

can someone tell me what code p0745 mean? thank mike

 

Mike,
P0745 is Line pressure solenoid or circuit fault or Check engine code 1205. Seems like its related to an auto transmisson error. If this is the case, the book says to check tranny fluid condition and correct level first. Hope this helps!!

 

thank bro

 

all of my sensors are in front of the cat my last one was in a pre cat in front of the cat maybe that is the one i need i think i will just test to make sure