Inspection Procedure

WARNING: This page is about a different car, the 2012 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

If any of DTCs P0115, P0117 or P0118 are set simultaneously with DTC P0116, the ECT sensor may have an open or a short circuit. Troubleshoot those DTCs first.
Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to FREEZE FRAME DATA .