Engine Controls - MIL ON/Multiple O2 Sensor DTC's Set
L-SB-0032-10May 20, 2010
MIL "ON" DTC P2195, P2197, P0138, P0158, P0031, or P0051
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
Introduction
Some 2010 model year RX 350 vehicles may exhibit a MIL "ON" condition with one or more of the following Diagnostic Trouble Codes (DTCs) stored in the Engine Control Module/ECM (SAE term:
Powertrain Control Module/PCM):
^ P2195 - Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1)
^ P2197 - Oxygen (A/F) Sensor Signal Stuck Lean (Bank 2 Sensor 1)
^ P0138 - Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
^ P0158 - Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2)
^ P0031 - Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)
^ P0051 - Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 2 Sensor 1)
Use the following repair procedure to address this condition.
Production Change Information
This TSIB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Warranty Information
^ This repair is covered under the Lexus Federal Emission Warranty. This warranty is in effect for 48 months or 50,000 miles, whichever occurs first, from the vehicle's in-service date.
^ Warranty application is limited to occurrence of the specified condition described in this bulletin.
Parts Information
Required Tools & Equipment
Additional TIS Techstream or Techstream Lite units may be ordered by calling Approved Dealer Equipment (ADE).
Repair Procedure
1. Using TIS Techstream verify DTC P2195 P2197 P0138 P0158 P0031 or P0051 are present.
2. Follow the procedure outlined in TSIB L-SB-0109-09, "MIL 'ON' DTC P0138 and/or P0158 Diagnostic Tips" to inspect the appropriate A/F and 02 sensor and circuit.
3. If the A/F sensor requires replacement, follow the procedure in the Repair Manual.
Refer to the Technical Information System (TIS), 2010 model year RX 350 Repair Manual:
4. Clear DTCs.
5. Test drive the vehicle to confirm the condition has been corrected.