p0973

getting a p0973 code cleared it many times. i am running a bd overdrive lockout and they use stupid posi taps out where the weather is. didnt have the problem till i washed it one day,which was liek over month ago, i have tanken the connections apart and put them back togather and still gettin the code any ideas ,

o and the check engine light is only on when i turn the key to on to warm heater or startign it once its started the light goes out .