Can someone help me with PCM wiring problem?

I have a 98 Chevy C1500 4.3L Engine. The wiring from the TPS to the PCM is showing low voltage. I checked the black and the gray, they have normal voltage but the dark blue one that goes from the TPS to the PCM is reading .02. Does this mean that the PCM is no longer working or is there a relay or sensor that can... show more I have a 98 Chevy C1500 4.3L Engine. The wiring from the TPS to the PCM is showing low voltage. I checked the black and the gray, they have normal voltage but the dark blue one that goes from the TPS to the PCM is reading .02. Does this mean that the PCM is no longer working or is there a relay or sensor that can be replaced to repair the voltage? I've had it diagnosed at my local auto store and the code that it sending out is P0122. Please help.
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