Oxygen Sensors

[kluthage421]

How many are on the '00 ES300?

[gordonw]

Three.

[camlex]

one between radiator and engine,

second between engine and firewall

Third after cat.

[kluthage421]

one between radiator and engine,

second between engine and firewall

Third after cat.

I replaced the one after the cat and the one in the front of the engine with Denso. I have yet to do the rear engine one. How do I determine if I need Air/Fuel Ratio sensors (Wide band O2) or normal oxygen sensors? I am receiving check engine code P1135 which, means the Bank 1 Sensor 1 is having heater circuit problems--the one that hasn't been replaced yet. Could this have been caused by not replacing all the sensors at once or could it have happened to coincidentally gone bad?

Thanks in advance.

[kluthage421]

one between radiator and engine,

second between engine and firewall

Third after cat.

I replaced the one after the cat and the one in the front of the engine with Denso. I have yet to do the rear engine one. How do I determine if I need Air/Fuel Ratio sensors (Wide band O2) or normal oxygen sensors? I am receiving check engine code P1135 which, means the Bank 1 Sensor 1 is having heater circuit problems--the one that hasn't been replaced yet. Could this have been caused by not replacing all the sensors at once or could it have happened to coincidentally gone bad?

Thanks in advance.

Anyone?

[lenore]

The two mounted on the engine front and rear are air fuel sensors, the one before the muffler is an oxygen sensor. They are not the same on these engines yet they can be screwed into the different positions. Stick with The denso ones at the correct locations...