I took my tst and mp-8 off and went to fill my truck up, my transmission doesn't lock up now, it's like it is slipping instead, 50 mph at 2000 rpm? usually 70 mph at 2000 rpm. getting code p0882, (TCM Power Input Signal Low) would like to check plug but don't know location, any help would be greatly appreciated, this is on 2005 automatic thanks in advance.