where oxygen sensor 1 in bank 1 is? Is this it?




I had got the CEL before and it said was the upper O2 sensor. I replaced that and a few days later got CEL again. This time i got a print out and it says.

P0135
The PCM has determined that a malfunction exists in the heater circuit for oxyen sensor 1 in bank 1.

What does that mean? Does it mean the heater circuit is bad or something like that?

car is a 97 ES300

 

bank 1 is the rear bank, the bank closest to the firewall.
sensor 1 is the sensor between the exhaust manifold and the cat.

The one you have pictured, if the orientation of the picture is from the front of the vehicle, is bank 2 sensor 1.

Most likely the sensor is lazy or failing. They can be tested off the vehicle with a multimeter if you have the proper specs. If the sensor needs to be replaced, online dealers may be cheaper. For example, www.sparkplugs.com or www.oxygensensors.com

steviej

 

yea from taht pick the bottom of the pic is the front of the car. so bank 1 sensor one is the o2 sensor on the lower part of the header right before the cat? I already bought the sensor jstu need to know where it is before i replace it.