Inspection Procedure
WARNING: This page is about a different car, the 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- DTC P050B may be set when the engine shows the symptom as listed below. If necessary, check the trouble area as listed below.
Symptoms Factor Trouble Area Low idle speed at engine cold. Excessive engine friction - Engine oil deterioration
- Drive belt tension
- A/C compressor
- Generator
- P/S pump
Rough idle at engine cold. Abnormal combustion Fuel quality - 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.