Lexus GS rough running engine

I also drive a GS 450h. I had a similar problem with the check engine light and the engine running rough. Did you check the fuel trims at all? What about the sensor readings? Might be worth a look before replacing parts.

Thank you for your input. I have not examined the fuel trims or sensor readings directly. Could you elaborate on which specific readings or values I should focus on when assessing the fuel pressure sensor's performance? I am unsure how to interpret the data effectively.

Honestly, without the right equipment, interpreting that data can be tricky. Given your symptoms, and the risk of misdiagnosis, I'd recommend taking it to a reputable workshop. They can properly diagnose the issue, and replace the sensor if needed.

I appreciate the advice. Based on your recommendation, I had the vehicle inspected by a workshop. The diagnosis confirmed a defective fuel pressure sensor due to a corroded connector. The repair, including parts and labor, amounted to 95€. The issue has been resolved. Thank you.