Code 13 posted by rightzedfred on August 28, 2018 at 04:52 PM
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travels up the wiring harness. So something else to check. How far up the harness did you splice in the new coolant connector? Also maybe check your splice - could just be bad?
Totally possible the new sensor actually failed - the FSM has a procedure for testing it. Could just try substituting the old sensor as a trial.
Might also be worth burping your coolant system. It’s possible an air pocket is a causing bad sensor readings although I think this is a long shot.