Canada - Engine Control - MIL ON DTCs P0172 P0175
Bulletin2396
Issue Date
April 10, 2007
Title
M.I.L. "ON" DTC P0172 & P0175
Component
ENGINE
Models
'06 - '07 IS250 (MTM)
INTRODUCTION:
Under certain driving conditions, some 2006 and 2007 model year IS 250 vehicles may exhibit a M.I.L. "ON" condition with one or both of the following DTCs:
- P0172 (System Too Rich [Bank 1])
- P0175 (System Too Rich [Bank 2])
The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic and PCV (Positive Crankcase Ventilation) valve has been modified to improve this condition.
NOTE:
Before proceeding, verify the ECM (PCM) calibration has NOT been updated by checking for the Authorized Modifications Label (shown in step 1 of the Repair Procedure).
APPLICABLE VEHICLES:
- 2006 - 2007 model year IS 250 vehicles equipped with the 4GR-FSE engine and manual transmission, and produced BEFORE the Production Change Effective VINs shown below.
PRODUCTION CHANGE INFORMATION:
WARRANTY INFORMATION:
PARTS INFORMATION:
REQUIRED SSTs:
CALIBRATION IDENTIFICATION CHART:
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. Replace the PCV valve.
Refer to the Repair Manual within E-TAS / TIS library:
- Division: Lexus
- Model: IS250
- Year: 2006 or 2007
- Service Category: Engine/Hybrid System
- Section: Emission Control
- Keyword: 4GR-FSE Emission Control: Ventilation Valve: Removal
- Keyword: 4GR-FSE Emission Control: Ventilation Valve: Installation
3. Flash reprogram the ECM (PCM).
NOTE:
- The Midtronics Battery charger MUST be used in Power Supply Mode to maintain battery voltage at 13.5 volts while flash programming the vehicle.
Follow the procedures outlined in TSB2064, "ECU Flash Reprogramming Process," and flash the ECM (PCM) with the NEW calibration file update.
4. Install the Authorized Modifications Label.
A. Using a permanent marker, enter the following information on the label:
- ECM (PCM) 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): TSB2396
B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1. The Authorized Modifications Label is available through the PDC, P/N 00451-00001-25.
5. Change the engine oil and filter.
Refer to the Repair Manual within E-TAS / TIS library:
- Division: Lexus
- Model: IS250
- Year: 2006 or 2007
- Service Category: Engine/Hybrid System
- Section: Lubrication
- Keyword: 4GR-FSE Lubrication: Oil Filter (for 4WD) / (for 2WD): Replacement
6. Start the engine and warm it up to normal operating temperature before test-driving.
7. The repair is complete. Test drive the vehicle to confirm normal operation.