PO 136 CODE AFTER BUMP ?

[mr-mike]

Hit a bad hole after which the service engine light came on , went home hooked up tester & brought up PO136 - O2 sensor circuit malfunction [ BANK1SENSOR 2 } checked all the conections & all seemed OK , erased code went for a drive went about 15 miles -no service engine light - hit a bump - back on same code ? is bank 1 sensor 2 is that drivers side rear sensor ? ? ? everything seems tight ????? any of you guys ever seen this before ? its a 99 4.6 , again thanks in advance ....also that front O2 sensor looks like a tough get at , I have no lift but on the ramps & jacked up I coudnt even find where the front O2 sensor conector is ? all the wire seem tight , no burn marks nothing seems loose ? please help ....... thanks again

 

[RedBullitt]

yeah its an annoying problem, you sensor should be fine. have you swapped the mid pipe, also, are the wires leading from the sensor up to the harness loose, hanging? i had the same problem for a long time, noticed my wires were not secured the way they were before the pipe swap, so i wired them up and bam no more problems
no sure why it would make a difference but it does. i removed the wires and the problem came back. any ideas?

 

[mr-mike]

Thanks , no my front pipes are the originals , everything as I can see looks tight I was hoping someine would write in .... if someone reads theses posts give us a hand , what are the banks & number one & two O2 sensors , drivers side - front or back ....