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need help!!! more damn codes coming up

This is a discussion on need help!!! more damn codes coming up within the Firebird / WS6 forums, part of the Vehicle Specific category; 161 & 174 what exactly are these codes??? already replaced 02 sensor passenger side bank 2 and replaced pcv valve ...

  1. #1
    Member trixysrace11's Avatar
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    maple red metalic
    2000 TRANS AM WS6

    need help!!! more damn codes coming up

    161 & 174 what exactly are these codes???

    already replaced 02 sensor passenger side bank 2
    and replaced pcv valve and hose (had a whole in it)

    a friend of mine tried to clear the check engine light after these repairs, and now these codes are coming up! grrrrrrrrrrr!!!

  2. #2
    None Shall Pass Knight's Avatar
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    Black
    99 WS.6 - Modified

    P0161 - Oxygen O2 Sensor Circuit Low Voltage (Bank 2, Sensor 2)

    It basically means the PCM detected either an excessive current draw, or an open or short in the circuit powering the oxygen sensor's heater circuit. This is in reference to the Heated Oxygen Sensor (2) located rear of catalytic converter (Bank 2).

    This will not affect performance. It will simply trigger your SES light.

    P0174 - System Too Lean (Bank 2)

    Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). A code P0174 may mean that one or more of the following has happened:

    The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. Or there could be a vacuum leak downstream of the MAF sensor.

    Are you running LT's? If so, are you using the O2's with the full length harnesses, or did you splice? Make sure the connectors are secure, and check the wiring to make sure it isn't contacting the exhaust and/or melted.

  3. #3
    Member trixysrace11's Avatar
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    maple red metalic
    2000 TRANS AM WS6

    I have an ls1 motor

  4. #4
    None Shall Pass Knight's Avatar
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    99 WS.6 - Modified

    I assumed you were referring to the car listed by your profile. The 2000 WS.6 only came with a ls1, unless you did an engine swap.

    - - - Updated - - -

    I assumed you were referring to the car listed by your profile. The 2000 WS.6 only came with a ls1, unless you did an engine swap.

  5. #5
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    '02 WS.6 / '07 Suburban

    Other possibilities are a vacuum leak (PCV system is a likely culprit), an exhaust leak that is drawing outside air into the system above the O2 sender, and low fuel pressure.

  6. #6
    Member Redrokit8's Avatar
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    Pewter Silver
    2002 Trans AM WS6

    Whew, electronics can drive a man to drinking.
    I was curious if your friend cleared the codes and they came back or he couldn't clear them at all.
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  7. #7
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    red
    2000 ta ws6

    he cleared the codes and they came back a day later.

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