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Drive cycle/ OBDII codes

Discussion in '1st Gen. Tacomas (1995-2004)' started by Jase, Jul 8, 2022.

  1. Jul 8, 2022 at 7:43 AM
    #1
    Jase

    Jase [OP] Well-Known Member

    Joined:
    Mar 30, 2021
    Member:
    #361044
    Messages:
    471
    First Name:
    jase
    Oregon
    Vehicle:
    2004 4x4 DC
    Rebuilt / frame swap at 200K
    When I got the truck rolling I went to DEQ to get my tags renewed, without checking the codes first (dumb). Assumed I’d pass because I had no CEL.
    Came back with a P0031, replaced upstream O2 sensor / air/fuel sensor with the correct Denso
    Now I have Evap System incomplete in my drive cycle. I’ve been following a couple different threads about how to complete the drive cycle.
    Anyway, yesterday afternoon it showed complete in my torque app, so I checked logged faults and got
    P0441
    P0442
    P0446.
    Did some quick research on here and figured I’d better pull the bed back off this weekend, but this morning it’s back to Evap System incomplete.
    Weird? Why would it say the drive cycle was complete and then go back? I didn’t clear any faults.
     
  2. Jul 8, 2022 at 8:06 AM
    #2
    Black DOG Lila

    Black DOG Lila Well-Known Member

    Joined:
    Jun 14, 2019
    Member:
    #296344
    Messages:
    9,116
    Virginia
    Vehicle:
    2003 Tacoma SR5 2.7 5 speed 4WD
    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    I had the same thing happen with those EVAP codes.
    When the purge Selnoid worked properly I got completed drive cycle even though it had stored codes for a single fault event.
    It takes 2 fault events to get CEL.
    I replaced vacuum hoses and purge Selnoid for the fix
     
    Jase[OP] likes this.
  3. Jul 8, 2022 at 8:30 AM
    #3
    Jase

    Jase [OP] Well-Known Member

    Joined:
    Mar 30, 2021
    Member:
    #361044
    Messages:
    471
    First Name:
    jase
    Oregon
    Vehicle:
    2004 4x4 DC
    Rebuilt / frame swap at 200K
    Thanks, that’s good to know.
     

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