Engine Controls - MIL ON, DTC P219A Or P219B Set
L-SB-0129-12
December 20, 2012
MIL "ON" DTC P219A or P219B
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
Introduction
Some 2012 model year RX 350 vehicles may exhibit a MIL "ON" condition with DTC P219A or P219B present. The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occurring. Please follow the repair procedure below to address this condition.
Warranty Information
Calibration Information
Parts Information
Required Tools & Equipment
Repair Procedure
1. Using TIS Techstream confirm one of the following DTCs are present:
^ P219A - Bank 1 Air-Fuel Ratio Imbalance
^ P219B - Bank 2 Air-Fuel Ratio Imbalance
If other DTCs are present this bulletin does NOT apply. Continue diagnosis per Repair Manual procedures.
2. 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 3.
3. Flash reprogram the ECM (PCM).
Follow the procedures outlined in Service Bulletin No. L-SB-0015-10 "Techstream ECU Flash Reprogramming Procedure", and flash reprogram 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 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 bulletin 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.
5. Test drive the vehicle to confirm proper vehicle operation.
© 2012 Lexus, a division of Toyota Motor Sales, USA