RAV4 2WD L4-2.5L (2AR-FE) (2009)
Oxygen Sensor: All Technical Service Bulletins
Engine Controls - MIL ON/DTC's P0138/P0158
T-SB-0001-10
January 7, 2010
MIL "ON" DTC P0138 and/or P0158 Diagnostic Tips
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
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.
^
Refer to TSB No.
"Engine Bank I and Bank 2 A/F and 02 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 02 sensor
DTC(s).