Will this sensor work with my existing wiring harness?

Yes. This is a direct replacement that plugs into the factory harness at the sensor location. No rewiring or adapters required.

Do I need any special tools to install this?

Installation is basic hand-tool work at the factory sensor location. Standard socket set and a sensor socket (if you have one) make the job faster, but it's not mandatory.

What if the sensor doesn't fix my check engine light?

A sensor replacement solves sensor-specific codes. If the light persists after install, the fault may be in wiring, the engine computer, or a different component. Have the code scanned post-install to confirm.