Caution / Notice / Hint
WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
- DTC P050B-00 may be set when the engine has the symptoms listed below. If necessary, check the trouble areas listed below.
Symptoms Factor Trouble Area Low idle speed when engine is cold
(immediately after engine start)Excessive engine friction - Engine oil deterioration
- Drive belt tension
- A/C compressor
- Generator assembly
Rough idle when engine is cold
(immediately after engine start)Abnormal combustion Fuel quality - Read Freeze Frame Data using the GTS. 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 moving or stationary, 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.