Canada - Engine Controls - MIL ON/Multiple O2 Sensor DTC's Set

Bulletin
TSB2379

Issue Date
2005-11-22

Market
Canada

Title
M.I.L. "ON" DTC P0171, P0174, P2195 OR P2197

Component
ENGINE ELECTRICAL

Models
'05 - '06 Highlander & '06 Highlander HV

INTRODUCTION:
Under certain driving conditions, some 2005 and 2006 model year Highlander and 2006 Highlander HV vehicles may exhibit a M.I.L. "ON" condition with at least one of the following DTCs:
- P0171 (System Too Lean [Bank 1])
- P0174 (System Too Lean [Bank 2])
- P2195 (Oxygen [A/F] Sensor Signal Stuck Lean [Bank 1, Sensor 1])
- P2197 (Oxygen [A/F] Sensor Signal Stuck Lean [Bank 2, Sensor 1])

The Air Fuel (A/F) sensor manufacturing process has been improved to correct this condition. The following repair procedures should be used to properly diagnose and repair the affected vehicles.

APPLICABLE VEHICLES:
- 2005 - 2006 model year Highlander vehicles produced BEFORE the Production Change Effective VINs shown below.
- 2006 model year Highlander HV vehicles produced BEFORE the Production Change Effective VINs shown below.






PRODUCTION CHANGE INFORMATION:






WARRANTY INFORMATION:






PARTS INFORMATION:






REQUIRED SSTs:

REPAIR PROCEDURE:

DTC P0171 or P0174
Refer to ETAS as follows:
- 2005 model year Highlander Repair Manual: Diagnostics: SFI System (applicable engine): P0171, P0174.
- 2006 model year Highlander Repair Manual: 2AZ--FE or 3MZ--FE Engine Control System: SFI System: P0171, P0174.
- 2006 model year Highlander HV Repair Manual: 3MZ--FE Engine Control System: SFI System: P0171, P0174.

NOTE:
Only replace the A/F sensor indicated by the M.I.L. "ON" DTC(s).

DTC P2195 or P2197
Refer to ETAS as follows:
- 2005 model year Highlander Repair Manual: Diagnostics: SFI System (applicable engine): P2195, P2197.
- 2006 model year Highlander Repair Manual: 2AZ--FE or 3MZ--FE Engine Control System: SFI System: P2195, P2197.
- 2006 model year Highlander HV Repair Manual: 3MZ--FE Engine Control System: SFI System: P2195, P2197.

NOTE:
Only replace the A/F sensor indicated by the M.I.L. "ON" DTC(s).

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.