Ok..got my codes ran for my check engine light being on. it came up to b my low coolant temp sensor. so i went over to the dealership got the sensor put it in n unplugged my battery to remove the code.so turn my car on 15 mins later check engine light came bak on n 20 mins later my car started boggin out and dies and it smells of gas..b4 thei changed the sensor it did the same thing the guy told me the my sensor was reading like -40 degrees and that the engine is dumpin to much fuel nto the motro which would make it bog out but i changed the sensor any tips or helpful ideas?

 

I have a few questions. First, where was the sensor you replaced? Is the code the same as before? The sensor you should have worked with is the one in the water pump, NOT the one by the #1 cylinder.

I say worked with because if you disconnect the sensor it will show -40. Meaning, usually when you have a maxed out reading like that, it's a wiring or connector problem. If you remove the connector to the sensor and measure both wires for voltage, you should have 5 volts. If you had a scanner, you could also do one other thing. Put a jumper wire across the 2 wires and you should be reading 130C at the PCM.

While you're there, measure the resistance of the ECT sensor. At 86 degrees F it will measure about 2200 ohms.

 

do i need to turn my car on to check the sensor voltage

 

Just key on engine off to read it.