Lexus LS Hybrid Boost Pressure Sensor Issue

I'm having trouble with my 2011 Lexus LS hybrid. The check engine light is on, and it's jerking when I accelerate. There's also a whistling and loud hissing sound when accelerating, it occasionally stalls at idle, fuel consumption is higher, and engine power is significantly reduced. The car has 150145 km on it. I suspect a bad boost pressure sensor. Has anyone had similar issues or insights related to the turbo system, intake manifold, or a boost leak?

4 comment(s)

Those symptoms sound like a boost pressure issue on your Lexus LS. The whistling and hissing, combined with the jerking and power loss, definitely point that way. Have you checked the cable and plug connection of the pressure sensor? A defective connection is a common, often overlooked cause.

Thanks, I visually inspected the cable and plug, but didn't see anything obvious. What should I specifically look for regarding a 'defective connection'? Can I test the sensor without specialized equipment?

A defective connection could be corrosion on the pins, loose wires, or a crack in the connector housing. These can disrupt the signal. Testing the sensor thoroughly might require more equipment than you have. Given the complexity, it might be best to consult a trusted workshop. They can do a comprehensive diagnostic check to pinpoint the exact cause. It could be the sensor, or something else in the turbo system.

I took your advice and brought it to a trusted workshop. After their tests, the cable connection of the boost pressure sensor was indeed defective. They replaced it, and the total repair cost was 95€. Thanks for pointing me in the right direction!

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