3SFE Sensor of some sort...

[wiccanferret]

When I was putting my distributor back together a sensor snapped in half. What sensor is this? Car runs just fine...just has a service engine light on.

[toyomoho]

If Green/Brown wires then EFI coolant sensor.

[wiccanferret]

Originally Posted by toyomoho

If Green/Brown wires then EFI coolant sensor.

Really? Temp gauge worked...

[scribby]

Its a seperate sensor for the EFI, the one for your tmp gague is on the other side.

[Mike Gerber]

Toyota calls that sensor the "ECT sensor" for engine coolant temperature sensor. The other posters are correct. That sensor sends a signal to the main computer (ECU) to tell the computer the temperature of the coolant, and hence the engine. The computer adjusts the fuel mixture accordingly. I'm guessing here, based on past experiences, but I believe the default without that sensor is probably a richer than normal mixture, so replace it soon. You should be able to get an aftermarket one for around $30-$40 at just about any auto parts store.

Mike

[atobe]

it's like 20$ and 5 mins of work... i did this b4