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Canada - Engine Controls - MIL ON/DTC's P0138/P0158






Bulletin
TSB3374

Issue Date
March 10, 2010

Market
Canada

Title
MIL "ON" DTC P0138 AND/OR P0158 DIAGNOSTIC TIPS

Component
ENGINE ELECTRICAL

Models
Applicable Toyota Models

INTRODUCTION:
Some vehicles may exhibit a MIL "ON" Diagnostic Trouble Code (DTC) P0138 and/or P0158 (Oxygen Sensor Circuit High Voltage Bank 1 or 2). In some instances a P2195 or P2197 (A/F Sensor Signal Stuck Lean) DTC may also be present. This condition may be caused by incorrect Air Fuel Ratio Sensor response. Additionally, a P0606 (ECM/PCM Processor) DTC may be present due to incorrect Oxygen Sensor operation. The following repair procedures should be used to properly diagnose and repair this condition.

NOTE:
- Refer to TSB No. 2088, "Engine Bank 1 and Bank 2 A/F and O2 Identification" before proceeding to confirm diagnosis is performed on the correct engine bank.
- Before proceeding, check for any other applicable TSB(s). Do not apply this diagnostic procedure if there is an existing TSB for A/F or O2 sensor DTC(s).






APPLICABILITY:






WARRANTY INFORMATION:

DIAGNOSTIC PROCEDURE:

HINT:
For information on checking circuit open, short, or resistance test procedures please refer to the applicable model and model year Repair Manual within E-TAS / TIS library:

- Division: Toyota
- Model: Avalon
- Year: 2005
- Service Category: General
- Section: Identification
- Keyword: How to Troubleshoot ECU Controlled Systems: Electronic Circuit Inspection Procedure

- Division: Toyota
- Model: Avalon
- Year: 2006/ 2007/ 2008/ 2009/ 2010
- Service Category: General
- Section: Introduction
- Keyword: Introduction: How to Troubleshoot ECU Controlled Systems: Electronic Circuit Inspection Procedure

- Division: Toyota
- Model: Camry
- Year: 2007/ 2008/ 2009/ 2010
- Service Category: General
- Section: Introduction
- Keyword: Introduction: How to Troubleshoot ECU Controlled Systems:Electronic Circuit Inspection Procedure

- Division: Toyota
- Model: Highlander
- Year: 2008/ 2009/ 2010
- Service Category: General
- Section: Introduction
- Keyword: Introduction: How to Troubleshoot ECU Controlled Systems: Electronic Circuit Inspection Procedure

- Division: Toyota
- Model: RAV4
- Year: 2006/ 2007/ 2008/ 2009/ 2010
- Service Category: General
- Section: Introduction
- Keyword: Introduction: How to Troubleshoot ECU Controlled Systems: Electronic Circuit Inspection Procedure

- Division: Toyota
- Model: Sienna
- Year: 2007/ 2008/ 2009/ 2010
- Service Category: General
- Section: Introduction
- Keyword: Introduction: How to Troubleshoot ECU Controlled Systems: Electronic Circuit Inspection Procedure

- Division: Toyota
- Model: Venza
- Year: 2009/ 2010
- Service Category: General
- Section: Introduction
- Keyword: Introduction: How to Troubleshoot ECU Controlled Systems: Electronic Circuit Inspection Procedure

1. Check all DTCs.
Are DTC(s) other than P0138 or P0158 present?
- YES -
- P2195 and/or P2197 DTC also present: Go to step 3.
- P0606 DTC also present: Go to step 4.
- NO - Go to step 2.

2. Check the A/F and O2 sensor values for the appropriate bank DTC Freeze Frame Data (FFD).
Is the AFS Voltage B#S1 = 3.35~3.70V AND the O2S B#S2 = 0.70~0.90V?
- YES - Replace the appropriate bank Air Fuel Ratio Sensor ONLY (NOT O2 Sensor) to correct the P0138 or P0158 DTC condition.
- NO - Inspect the O2 B#S2 circuit for open, short, or high resistance. If no trouble is found, refer to ETAS, applicable model and model year Repair Manual for P0138/P0158 diagnosis:
- Division: Toyota
- Model: Avalon
- Year: 2005
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: SFI System: Diagnosis System

- Division: Toyota
- Model: Avalon
- Year: 2006/ 2007/ 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: Camry
- Year: 2007/ 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: Highlander
- Year: 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: RAV4
- Year: 2006/ 2007/ 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: Sienna
- Year: 2007/ 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: Venza
- Year: 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

3. Inspect Air Fuel Ratio Sensor for the appropriate bank.
Does the Air Fuel Ratio Sensor have an open or short on the A1A+ or A1A- wires?
- YES - Repair the harness and revaluate the Air Fuel Ratio Sensor operation. Confirm the previous DTC(s) do not reset.
- NO - Replace the applicable bank Air Fuel Ratio Sensor ONLY to correct the P2195/P0138 or P2197/P0158 DTC condition. Test drive the vehicle to confirm none of the previous DTC(s) reset.

4. Inspect Oxygen Sensor 2 Freeze Frame Data (FFD) values.
Is the O2S B#S2 voltage more than 1.10v and/or the O2S Impedance B#S2 more than 300 ohms when engine is at normal operating temperature?
- YES - Inspect O2 B#S2 circuit for open, short, or high resistance. If no harness issues are found, replace the appropriate bank O2 Sensor ONLY to correct the P0606 DTC.
- NO - Follow the Repair Manual diagnostic procedure for P0138/P0158 DTC:
- Division: Toyota
- Model: Avalon
- Year: 2005
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: SFI System: Diagnosis System

- Division: Toyota
- Model: Avalon
- Year: 2006/ 2007/ 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: Camry
- Year: 2007/ 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: Highlander
- Year: 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: RAV4
- Year: 2006/ 2007/ 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: Sienna
- Year: 2007/ 2008/ 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

- Division: Toyota
- Model: Venza
- Year: 2009/ 2010
- Service Category: Engine/Hybrid System
- Section: Engine Control
- Keyword: 2GR-FE Engine Control System: SFI System: Diagnosis System

If the MIL "ON" condition continues to occur after this procedure, refer to the Repair Manual for further diagnostic procedures and specifications.

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.
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