emmahuber9
Monza Jerky Acceleration Whistling Hissing
Summary of the thread
A 2020 Chevrolet Monza is experiencing jerky acceleration, a whistling and hissing sound, stalling at idle, increased fuel consumption, and reduced power, with the check engine light on. The suspected cause is a faulty boost pressure sensor or a bad connection. The issue was confirmed to be a defective connection to the boost pressure sensor, which was resolved by fixing the cable and replacing the sensor, resulting in restored vehicle performance.
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4 comment(s)
emmahuber9 (community.author)
Interesting! So, what exactly was the problem with yours? Was it the sensor itself or just a loose connection like I'm thinking? And did you notice a big difference in fuel economy after you fixed it?
elisakoehler11
Mine turned out to be the sensor and the cable. I'd say it's definitely worth getting it checked out by a professional. They can run diagnostics and pinpoint the problem for sure. It’s kind of like trying to diagnose a heart problem with a stethoscope only. You need the full ECG to see what’s really going on!
emmahuber9 (community.author)
Thanks for the advice! I took it to the workshop, and you were right, it was a defective connection to the boost pressure sensor. They fixed the cable and replaced the sensor. Total cost was 95€. Runs like new now!
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CHEVROLET
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MONZA
elisakoehler11
Sounds familiar! I had a similar issue with my Chevrolet, and those symptoms – the whistling, hissing, and jerky acceleration – are dead giveaways. It could be the boost sensor. Like a leaky faucet, even a small issue there can cause a big drop in performance.