Oxygen Sensor Problem on my 2003 CC

JG03QUADCAB · Post by **JG03QUADCAB** » Mon Jun 04, 2007 2:32 pm

I have a 2003 CC 4.3L. My check engine light came on the other day. I took it by Autozone and the diagnostic test came back with two error codes. Error P0135 stated H02S 11 Heater condition( Heeated Oxgen Sensor Bank 1 Sensor 1). The secons error P0155 stated H02S 21 Heater condition ( Heated Oxygen Sensor Bank 2 Sensor 1) Is the Bank 1 Sensor 1 and Bank 2 Sensor 1) the two O2 sensors beside each other before my Cat?

Post by **HenryJ** » Mon Jun 04, 2007 2:39 pm

Yes.
Just as Steve said in your first thread- Oxygen Sensor Replacement

JG03QUADCAB · Post by **JG03QUADCAB** » Mon Jun 04, 2007 2:45 pm

Henry J,

Once I replace my Oxgen Sensors will I be able to tell a great deal in my throttle responce and gas milege that was lagging before?

Post by **HenryJ** » Mon Jun 04, 2007 2:53 pm

Not likely.
Unless they are severely contaminated and have over 100k miles on them. Even then the difference would likely be subtle.