CEL P0141 Code wont go away 3RZ 1996
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CEL P0141 Code wont go away 3RZ 1996
Have a 1996 T-100 2wd auto 3RZ.
Truck about 2 years ago truck threw a code P0141 for the oxygen sensor.
Last year I replaced the front sensor and the light remained.
I continued to drive the truck as normal since it didnt seem to affect mileage at all.
Last month the oem cat converter rotted out and i noiced the rear sensor was barely held in at all .
I replaced the entire midpipe section , cat converter and all .
Also picked up an LCE Header for a good deal.
Got everything installed , cleared the codes and drove for 2 day with no issues .
Boom code comes back P0141
I have the wiring diagram for the truck .
I tested all the wires from both sensors back to the ecu in the kick panel to determine if any wires were broken ...
All checked out fine .
Front sensor colors are black and pink/green and white/red and brown
Rear sensor colors are white and red/green and white/red and brown
I guess that brown always shows 12volt with key on and white/red is ground , these wire are common to both sensors.
When i run the truck and plug in my scanner I can see live feedback from both sensors , that makes me think that the sensors are doing their job .
Can it be the ecu ?
Any ideas ?
Thanks
Truck about 2 years ago truck threw a code P0141 for the oxygen sensor.
Last year I replaced the front sensor and the light remained.
I continued to drive the truck as normal since it didnt seem to affect mileage at all.
Last month the oem cat converter rotted out and i noiced the rear sensor was barely held in at all .
I replaced the entire midpipe section , cat converter and all .
Also picked up an LCE Header for a good deal.
Got everything installed , cleared the codes and drove for 2 day with no issues .
Boom code comes back P0141
I have the wiring diagram for the truck .
I tested all the wires from both sensors back to the ecu in the kick panel to determine if any wires were broken ...
All checked out fine .
Front sensor colors are black and pink/green and white/red and brown
Rear sensor colors are white and red/green and white/red and brown
I guess that brown always shows 12volt with key on and white/red is ground , these wire are common to both sensors.
When i run the truck and plug in my scanner I can see live feedback from both sensors , that makes me think that the sensors are doing their job .
Can it be the ecu ?
Any ideas ?
Thanks