So I cranked my car up today and was driving to work and my damn check engine light comes on. I jump the service pin and it pulls up code 6 (Engine Coolant Temperature Sensor)?.*

**99 EM1, stock harness, chipped p28, GSR swap**

I have a couple of questions:

1. What exactly does this sensor do and where is it located? (If I remember rcorrextly it's on thermostat housing but I'm not too sure)

2. How can I test to see if it's good?

3. Could this make my VTEC not engage?

Any help is appreciated! Thanks!



Josh*

 

1. it tells you how hot your coolant is

2. not sure.

3 i believe that vtec will not cross if the ecu is throwing a code.

 

wrong vtec will cross if cel is on know that cooloant tempp sensor could be the problem why ur vtec is not working does ur coolant guage still work?with i bad sensor it might be telling the ecu that the engine is still cold witch vtec wont work unless motor is warm

 

also known as TW sensor/ECT sensor not the coolant temperature sensor that goes to the gauge

I think it may not let VTEC activate because this sensor lets the ECU know the coolant temp and alters ignition/fuel curves accordingly

 

Problem solved it was a break in one of the two wires lol

 

All I know is that my car ran like asssssss whenever that sensor wasn't working haha