O2 sensor on 2001 Galant

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John Smith - 24 May 2007 17:20 GMT

My 2001 Galant 2.3L 4-cyl with auto tells me that the O2 sensor heater
circuit is malfunctioning and the code book says that the DTC PO135 refers
to Bank 1 Sensor 1.

Am I correct in thinking that means the "front" sensor? I sure do
appreciate someone's experience in this area. Thanks.

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morshedbashir@gmail.com - 25 May 2007 01:45 GMT

> My 2001 Galant 2.3L 4-cyl with auto tells me that the O2 sensor heater
> circuit is malfunctioning and the code book says that the DTC PO135 refers
> to Bank 1 Sensor 1.
>
> Am I correct in thinking that means the "front" sensor? I sure do
> appreciate someone's experience in this area. Thanks.

To my knowledge, the car has 2 oxygen sensors, front and back. The one
in "back" will never set a code because of the job it does. So if
there is a code saying oxygen sensor fault, it must be the "front"
one.

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