Does this sensor come with a pigtail connector, or do I reuse my old harness?

Reuse your existing connector and harness. This sensor plugs directly into the factory wiring with no additional pigtail needed.

Will a bad sensor trigger a check engine light?

Yes. If your Dakota is throwing a sensor-related code, replacing this unit will clear the fault — provided the electrical connector and wiring are in good condition.

Do I need any tools beyond basic hand tools to swap this in?

A socket set and wrench are all you need. Access is straightforward on the Dakota engine bay — no special extraction tools required.