four wire oxygen sensor for 4efte

[4turbo]

hi all :
can anyone help me with the part number for the four wire oxygen sensor if the 4efte engine supported with ? because i can`t find it on diytoyo.com
thanks

 

[steve-gers]

It is a single wire lambda sensor on the 4EFTE engine

 

[4turbo]

i know there is one wire oxygen sensor on the exhaust outlet from the turbo , what i mean is there four wire oxygen sensor after that ?

 

[dac69er]

there is not. just a single wire one just after the turbo and then a 2 wire temperature sensor after that.

 

[4turbo]

the 4efte engine that i installed on my corolla 1995 i think it was on paseo , what do you think can you provide me with part number for the four wire oxygen sensor , the cable connector is already coming out from the engine electric looming

 

[dac69er]

there should not be a 4 wire oxygen sensor on a 4efte so there would be no part number for it. get get a universal 4 wire sensor if you want to fit a 4 wire one.

 

[4turbo]

thank you
dac69er

for the info, but when i check with voltmeter i found there is power in the plug ! is the power coming from ECU or it`s coming from the car electric power ?

 

[dac69er]

on a 4 wire sensor there will be 2 wires that are normally the same colour which are for the heater. one will have 12v when the ignition is on and one will go down to ground.
the other 2 are the signal and the ground wire for the sensor itself.

the 4efte oxygen sensor is only 1 wire. this is for the signal which is generated by the sensor itself with a maximum voltage of 1v.


if you have a conversion someone could have kept the heater circuit and a ground wire, but as the sensor is so close to the turbo a heater is not needed. as long as you have the sensor signal connected to the ecu then it will work fine.