TSB: Code P0125

[galaxee]

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 Control”. 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.

[ZC1]

Just for general knowledge:
The Technical Service Bulletin [TSB] T-SB-0088-08 applies to 2004 through 2007 models.

ZC1

[JayGoldstein]

Originally Posted by galaxee

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.

What is an "M.I.L."?

[TheForce]

Malfunction Indicator Light

[Patrick Wong]

Originally Posted by TheForce

Malfunction Indicator Light

aka the amber warning light that looks like a little engine.

[Patrick Wong]

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.

[Tideland Prius]

Originally Posted by Patrick Wong

aka the amber warning light that looks like a little engine.

aka the CEL or Check Engine Light.