Lexus UX Check Engine Light and Manifold Pressure

Hello. I own a 2021 Lexus UX hybrid, with 41121 km. Recently, the check engine light came on, and I've noticed diminished engine power, sluggish response, and increased fuel consumption. I suspect a faulty manifold pressure sensor. Could a large vacuum leak cause this?

4 comment(s)

Hi there. I've had a similar experience with my UX. The symptoms you describe mirror what I encountered. Have you checked for any obvious cracks or disconnections in the vacuum lines? My issue turned out to be a faulty pressure sensor indeed. Was your car idling rough?

Thanks for your reply. The car isn't idling very rough, but it's definitely not as smooth as it used to be. How did you confirm it was the pressure sensor? Did you use an OBD reader to check the sensor values?

Initially, I suspected a vacuum leak, but after a visual inspection yielded nothing, I took it to a workshop. They used diagnostic tools to confirm the pressure sensor was providing incorrect readings. Replacing it resolved all the issues. It cost me around 240€ for the sensor and labor.

Thank you so much for sharing your experience! I'll take it to a trusted mechanic for a proper diagnosis and sensor replacement. Your insight is greatly appreciated. At least I can expect around 240€ for the repair.

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