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I have a code po201. The number one injector is staying open.

(2004 Chrysler Pacifica)
in Potwin, KS on July 08, 2014
I have switched injectors and still stuck open. Tested the wire harness on all injectors with DVOM. #1 harness is showing 14volts with key on, the others show zero volts. Is this most likely a bad PCM or ASD, or could it be bad wire somewhere. What is the easiest way to find out if the PCM is bad?
Thanks!
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