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OBD2 codes for 2000 camaro z28

This is a discussion on OBD2 codes for 2000 camaro z28 within the General Help forums, part of the LSx Technical Help Section category; hello all, I just bought this 2000 M6 z28 and I have a few codes (not CEL codes) that i ...

  1. #1
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    2000 camaro z28

    OBD2 codes for 2000 camaro z28

    hello all, I just bought this 2000 M6 z28 and I have a few codes (not CEL codes) that i pulled up with my friends OBD2 reader made by CENTECH, i would like to know if ANY of these readings look out of the ordinary. The person i bought the car from told me that everything is pretty much stock, except for the flowmasters.

    these readings are when the car is off, on accessory mode

    DTC_CNT: 0
    FUELSYS1: CL
    FUELSYS2: CL
    LOAD_PCT: 0.0
    ETC: 198
    SHRTFT1: 0.0
    LONGFT1: 7.0
    SHRTFT2: 0.0
    LONGFT2: 9.4
    MAP: 30.1
    RPM:0
    VSS: 0
    SPARK ADV: 0
    IAT: 0.000
    TP: 0.0
    AIR_STAT: OFF
    02B1S1: 0.045
    SHRTFTB1S1: 0.0
    02B1S2: 0.025
    02B2S1: 0.015


    I even got codes from when the car is on in neutral position

    DTC_CNT: 0
    FUELSYS1: CL
    FUELSYS2: CL
    LOAD_PCT: 2.0
    ETC: 188
    SHRTFT1: 2.3 - 3.1
    LONGFT1: 10.2
    SHRTFT2: 0.0 - 3.1
    LONGFT2: 14.1
    MAP: 8.9
    RPM: 811
    VSS: 0
    SPARK ADV: 21-23
    IAT: 133
    MAF: 0.746 - 0.762
    TP: 0.0
    AIR_STAT: OFF
    02B1S1: 0.065 - 0.800
    SHRTFTB1S1: -0.6 ~ -3.1
    02B2S2: 0.095

    I also got readings from the bank sensor's

    02 BANK 1 SENSOR 1

    (rich-lean threshd)
    MOD: $10
    MEAS: 0.365

    (LOW FOR SWITCH)
    MEAS: 0.300

    (HIGH FOR SWITCH)
    MEAS: 0.600

    (RICH-LEAN SWITCH)
    MEAS: 0.040
    MIN: 0.000
    MAX: 0.248

    (LEAN-RICH SWITCH)
    MEAS: 0.024
    MIN: 0.000
    MAX: 0.152


    02 BANK 2 SENSOR 1

    (rich-lean threshd)
    MOD: $10
    MEAS: 0.365

    (LOW FOR SWITCH)
    MEAS: 0.300

    (HIGH FOR SWITCH)
    MEAS: 0.600

    (RICH-LEAN SWITCH)
    MEAS: 0.052
    MIN: 0.000
    MAX: 0.248

    (LEAN-RICH SWITCH)
    MEAS: 0.032
    MIN: 0.000
    MAX: 0.184


    please anyone who knows the specifications for these codes shoot me in the right direction, thanks and god bless
    Last edited by rafael707; 04-29-2012 at 12:12 AM.

  2. #2
    Senior Member 1MileCrash's Avatar
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    1999 Z/28 M6

    What codes were actually set? P0171 and p0174? Separate o2 codes? Without code numbers its hard to say other than either both front o2 sensors are bad, high or low fuel pressure, or air intake issues.
    1999 Z/28

    M6 w/ Hurst shifter and SLP skip shift eliminator, drilled rotors, Y3F package, SLP lid w/ K&N filter, VFN fiberglass 2" cowl hood, TSP 1 3/4" headers & ORY

  3. #3
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    Quote Originally Posted by 1MileCrash View Post
    What codes were actually set? P0171 and p0174? Separate o2 codes? Without code numbers its hard to say other than either both front o2 sensors are bad, high or low fuel pressure, or air intake issues.

    i had a vacuum leak, from a hose that connects to the intake manifold, which gave me 7 error codes

    -p0171
    -p0174
    -p0122
    -p0300
    -p0410
    -p0102

    i changed the hose, reset the codes with the OBD2 scanner, and havent got any CEL lights since.

  4. #4
    Senior Member 1MileCrash's Avatar
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    1999 Z/28 M6

    p0171 - system lean bank 1; possible causes: vacuum leak, O2 sensor, possible mass air flow sensor or high or low fuel pressure if set with p0174

    p0174 - system lean bank 2; possible causes: vacuum leak, O2 sensor, possible mass air flow sensor or high or low fuel pressure if set with p0174

    p0122 - tps sensor input low; possible causes: bad connection, mounted incorrectly, bad tps, bad ecm

    p0300 - random multiple cylinder misfire; possible causes: plugs, wires, coils, vacuum leak, faulty O2 sensors, clogged egr passage

    p0410 - secondary air injection system; possible causes: bad air pump, clogged air passage

    p0102 - mass air flow low input; possible causes: bad wiring/connection, dirty/clogged maf, bad maf

    keep an eye on things now that the light is off but i would also suggest taking the maf off, cleaning it and checking the wiring since there are several codes coming up pointing towards a faulty maf.

  5. #5
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    So far i have not got any CEL, so i think im pretty safe. thanks for the input

  6. #6
    Senior Member 1MileCrash's Avatar
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    sure thing. happy to help when and where i can

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