Engine Controls - MIL ON/DTC P3190, P3191/P0A0F

T-SB-0205-11

December 23, 2011

MIL "ON" DTC P3190, P3191 and/or P0A0F

Service Category
Engine/Hybrid System

Section
Engine Control

Market
USA





Applicability

Introduction

Some 2010 - 2011 model year Prius vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code(s) (DTCs) P3190 (Poor Engine Power), P3191 (Engine Does Not Start) and/or P0A0F (Engine Failed to Start). The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been revised to address this condition.





Calibration Information





Warranty Information





Parts Information





Required Tools & Equipment

Repair Procedure





1. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 1. Confirm if the ECM (PCM) calibration has been updated. If the calibration ID listed is NOT the latest ECM (PCM) calibration - go to step 2.

2. Flash reprogram the ECM (PCM).

NOTE

^ The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain battery voltage at 13.5 volts while flash reprogramming the vehicle.

^ For details on how to use the GR8 Battery Diagnostic Station, refer to the GR8 Instruction Manual located on the Technical Information System (TIS), Diagnostics - Tools & Equipment - Battery Diagnostics.

Follow the procedures outlined in TSB No. T-SB-0064-10, "Techstream ECU Flash Reprogramming Procedure" and flash the ECM (PCM) with the NEW calibration file update.

3. Install the Authorized Modifications Label.

A. Using a permanent marker enter the following information on the label:

^ ECM part number [Refer to the Parts Information section for the CURRENT PART NUMBER]

^ Calibration ID(s) [Refer to the Calibration Identification Chart for the NEW CALIBRATION ID]

^ Dealer Code

^ Repair Date

^ Change Authority [This TSB number]

B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1. The Authorized Modifications Label is available through the MDC P/N 00451-00001-LBL.

4. Test drive the vehicle to confirm proper vehicle operation.