Engine Controls - MIL ON/DTC's P0171/P0174/P2195/P2197
ENGINEEG018-05
Title:
M.I.L. "ON" DTC P0171, P0174, P2195, OR P2197
Models
'05 - '06 GX 470 & '06 LX 470
November 17, 2005
Introduction
Under certain driving conditions, some 2005 and 2006 model year GX 470 and 2006 model year Lx 470 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 GX 470 vehicles produced BEFORE the Production Change Effective VIN shown below.
^ 2006 model year LX 470 vehicles produced BEFORE the Production Change Effective VIN shown below.
Production Change Information
Warranty Information
Applicable Warranty*:
This repair is covered under the Lexus Comprehensive 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 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 or 2006 model year GX 470 Repair Manual: Diagnostics: SFI System (2UZ-FE):
P0171, P0174.
^ 2006 model year Lx 470 Repair Manual: 2UZ-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 or 2006 model year GX 470 Repair Manual: Diagnostics: SFI System (2UZ-FE):
P2195, P2197.
^ 2006 model year LX 470 Repair Manual: 2UZ-FE Engine Control System:
SFI System: P2195, P2197.
NOTE:
Only replace the A/F sensor indicated by the M.I.L. "ON" DTC(s).