Lexus LX boost pressure sensor issue

I'm having trouble with my 2012 Lexus LX diesel. It's got about 230,000 km on it. Lately, the check engine light keeps coming on, and the car is jerking when I accelerate. I'm also hearing whistling and loud hissing when I try to speed up. Sometimes, the engine even stalls when I'm idling. My fuel consumption has gone up, and it feels like the engine doesn't have the same power. Any ideas what might be going on? I’ve checked the air intake, but I’m not really sure what I’m looking for.

4 comment(s)

That sounds similar to an issue I had with my old Volvo V70. Those symptoms – check engine light, jerking, hissing – point to a problem with your boost pressure sensor. It could be a faulty sensor, or more likely a defective cable or plug connection. You should check the intake manifold, but it might be difficult for you to diagnose the specific root cause.

Thanks! You mentioned a defective cable or plug connection. Where exactly should I be looking for that, and is it something I could fix myself without special tools?

On my Volvo, the connection to the boost pressure sensor was loose. However, accessing it required removing a few other components, and the space was tight. Given the potential for misdiagnosis and the need for specialized tools, I would recommend taking your Lexus to a trusted workshop. It might save you time and further expenses in the long run.

Thanks a lot for the insight! I took it to the workshop, and you were spot on. It was the boost pressure sensor cable – cost me 95€ to get it sorted. The check engine light is off, and it’s running smoothly again.

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