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burlmart's avatar
burlmart
Explorer
Apr 21, 2015

Recurring engine bank 1 sensor 1 trouble code

about 2 months ago i posted a thread where i learned how to scan the engine for DTCs. the CEL had come on and i scanned to find the 2005 chevy 6.0L (the chevy has 43,000 mi) had two codes: P0449 (EVAP emmission control vent vlv/sol malf), and P0053 (HO2S bank 1 sensor 1 heater resistance).

i erased them to see what would stick, and after a few startups and around 200 mi later, the CEL has returned w/ two Actron scanner error codes: P0053 and P0053 pd (pending).

i googled some info and found out about where to look for the sensor. if i am correct, a chevy bank 1, sensor 1 is on driver side, up front by cylinder 1. from the open hood, feeling in that area, i do find what appears sorta like a spark plug with wires coming out top that are wrapped in shiny sheathing/insulation. this wire disappears into a fatter black sheathed conduit of what i suppose contains other wires being routed someplace. thus i do not know where this (what i am taking to be the) B1S1 O2 sensor's harness comes out at its other end and is connected.

from under the engine, i am pretty sure i spot the B1S2 O2 sensor on the downstream-of-catalytic side with a short black wire rising 12" or so to its connection harness.

how critical and/or common is P0053? am i actually feeling looking at B1S1? do i need to remove the cab doghouse to find its harness connection? i hope not since i do not see/know how to do that.

as always, any insights would sure be helpful and appreciated.
  • j-d's avatar
    j-d
    Explorer II
    Two helpful Harbor Fright items:

    I have this "offset wrench"



    But they also have this traditional "socket"

  • Bank one is the left side on a 6.0L Chevy. It refers to the side the #1 cylinder is on; bank 2 is the other side) and sensor one is the pre-cat sensor (sensor 2 refers to the post-cat sensor).

    I would think you'd be able to see it somehow rather than feel around for it. You're also going to have to follow the wires (probably not very far) to a plug so you can disconnect it.

    EDIT: And a 7/8" open-end/box wrench will come in really handy here. If you're lucky enough to be able to get a socket on it you can buy an O2 sensor socket that has a slit in it to accommodate the wires.
  • That is a code (0053) for an oxygen sensor.
    It should be the first oxygen sensor for your other code. It should be before the cat converter.