Engine Controls - MIL ON/DTC's P0171/P0174/P2195/P2197
ENGINEEG052-05
Title:
M.I.L. "ON" DTC P0171, P0174, P2195, OR P2197
Models
'05 - '06 Highlander & '06 Highlander HV
November 16, 2005
Introduction
Under certain driving conditions, some 2005 and 2006 model year Highlander and 2006 model year 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
Applicable Warranty*:
This repair is covered under the Toyota Federal Emission Warranty. This warranty is in effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle's in-service date. For California specification vehicles sold, registered, and operated in California, Maine, Massachusetts, and Vermont, this repair is covered under the California Emission Warranty, which is 36 months or 50,000 miles, whichever occurs first, from the vehicle's in-service date.
* Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Parts Information
Required SSTs
Repair Procedure
DTC P0171 or P0174
Refer to the Technical Information System (TIS) 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 TIS as follows:
^ 2005 model year Highlander Repair Manual: Diagnostics: SFI System (applicable engme): 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).