My ecu threw the 12 03 code and according to the decoder the problem is; Line pressure selenoid valve(automatic transmission) where would this be located and what should be my next step. I am guessing this happened because I had disconnected the resistor(I made a switch for it)but I am not certain. I would like to prevent anything serious from afflicting the transmission. Any help would be greatly appreciated. Thank you.

 

Well, cutting out that resistor basically nulls the rest of the tranny's fluid pressure regulation as its part of that system. Without it, the tranny always run at full line pressure. Reconnect the resistor and reset the codes. I doubt anything is damaged, for now. If you cut the resistor out a lot, you will likely end up toasting your trans. This is the code the ECU throuws when you cut out that resistor.

 

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