TSB: Code P0125

Discussion in 'Toyota Prius Service Bulletins - TSBs' started by galaxee, Jun 8, 2008.

  1. galaxee

    galaxee mostly benevolent

    Joined:
    Mar 14, 2005
    9,810
    429
    0
    Location:
    MD
    Vehicle:
    2005 Prius
    T-SB-0088-08 June 6, 2008

    Introduction
    Some customers may report a M.I.L. “ON†condition that occurs after operating the vehicle for
    extended times in “Ready ON†mode with the transaxle in the Park position.
    The following Diagnostic Trouble Code (DTC) may be found: P0125 “Insufficient Coolant Temperature
    for Closed Loop Fuel Controlâ€. The Engine Control Module (ECM) (SAE term: Powertrain Control
    Module/PCM) logic has been modified to improve this condition. Use the following repair procedure
    for applicable vehicles.
     

    Attached Files:

  2. ZC1

    ZC1 Junior Prius Owner

    Joined:
    Apr 18, 2008
    711
    13
    0
    Location:
    Metro Detroit
    Vehicle:
    2008 Prius
    Just for general knowledge:
    The Technical Service Bulletin [TSB] T-SB-0088-08 applies to 2004 through 2007 models.

    ZC1
     
  3. JayGoldstein

    JayGoldstein Member

    Joined:
    Aug 3, 2006
    120
    3
    0
    Location:
    Winnipeg, Manitoba, Canada
    Vehicle:
    Other Hybrid
    Model:
    N/A
    What is an "M.I.L."?
     
  4. TheForce

    TheForce Ron Paul 2012

    Joined:
    May 30, 2005
    3,454
    462
    0
    Location:
    Wheelersburg, Ohio
    Vehicle:
    2006 Prius
    Model:
    N/A
    Malfunction Indicator Light
     
  5. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,086
    6,067
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    aka the amber warning light that looks like a little engine.
     
  6. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,086
    6,067
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    Note that subject TSB T-SB-0088-08 requires ECM calibration ID 34705400 to be uploaded to the ECM for 2004-2005 models. Prior to this TSB being released, I had seen TSB EG047-04 which related to an engine no-start or low power situation (file attached below.) That TSB required ECM calibration ID 34705100 to be uploaded to the ECM.

    My question relates to ECM calibration IDs 34705200 and 34705300. Has anyone seen a TSB or other technical documentation that describes what those firmware changes were intended to correct?

    The reason that I've been looking at powertrain-related TSBs is because I noticed some power surging when driving my 2004 (64K miles) on a trip to Palm Springs earlier this week. No warning lights.

    Ambient temps were moderate in the early evening, I had the air conditioning off. The surging got to the point where I was thinking about where I could safely pull over on I-10 in case the car stalled. However, the drivetrain then resumed normal behavior and I continued my trip without further incident.
     

    Attached Files:

  7. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    40,351
    11,880
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    aka the CEL or Check Engine Light.
     
  8. Marcilla Smith

    Joined:
    May 14, 2018
    101
    89
    3
    Location:
    Raleigh, NC
    Vehicle:
    2005 Prius
    Model:
    N/A
    Pray excuse me for reviving so old a thread. Is this still, perhaps, a relevant issue?

    I ask because I continue to get an MIL/CEL for P0125 despite having replaced the thermostat just 3 weeks ago. Perhaps the sensor is bad, but wouldn't it have come back sooner, if that was the case? Furthermore, I typically notice the MIL return in the morning after the car has been in READY- Park for 8+ hours (it's my motorhome).

    Replacing the sensor shouldn't be too much of a hassle, but Autozone wanted $70. I haven't checked prices online yet
     
  9. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    85,530
    37,709
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i would start a new thread
     
Loading...