I have an 03 sohc 4.6. i recently installed long tubes and an off-road x pipe. I hooked my o2 sensors back up properly and also added MIL illiminators to the rear sensors. My car ran fine for about a week then an engine light came on. here are the codes it gave me. po443, p1451, po133, po135, po141, po155, po165, p1409, po136, po156, p1151. i purchased new o2 sensors since this fixed this same problem i had on my other mustang, but it did not in this case. all ground wires are hooked up. has anyone delt with this problem?? thanks for the help.

 

do u have extensions to hook the back o2 sensors back up??

i could be wrong but since the front sensors are getting an actual reading and the rear r getting a set reading, those readings may be contradicting themselves

cauing the computer to notice something is wrong setting the DTC's

again i've never had this happen so maybe im completely wrong just thowing my 2 cents out there

 

yes all o2 sensors are properly hooked up, yes all grounds are hooked up.. the only thing i can think of is a new maf sensor, but im not realy wantin to spend the $$ jst to find out its not the problem. is there anything else that could be causing this idle and MIL/DTC problem besides a bad intake sensor??????
once the codes are cleared, when i start my car it still idles bad, but no MIL light will come on, the codes wont pop up till the 2nd time i start it.

 

dont worry i figured it out.

 

what was it?

 

someone ****ed with my car and pulled a fuse. it was completely missing, not just blown. pretty sweet.