I would check the wiring and connections first. Here is a guide and the engine wiring diagrams so you can run tests:
If the wiring checks out you will need to have the PCM reprogrammed for about $130.00.
Here are the engine wiring diagrams.
Check out the diagrams (below).
Please let us know what you find. We are interested to see what it is.
Images (Click to enlarge)
Friday, February 9th, 2018 AT 11:32 AM