gretameier54
Twingo Boost Pressure Control Fault
Summary of the thread
A 2023 Renault Twingo owner experienced a check engine light, sluggish performance, and high fuel consumption, suspecting a boost pressure control fault. Possible causes discussed included issues with the pressure sensor, vacuum lines, or a faulty bypass valve. The suggested solution was to have the car professionally diagnosed, leading to the discovery of a faulty vacuum switching valve, which was repaired, resolving the issue.
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4 comment(s)
gretameier54 (community.author)
Yes, it's had regular service. I haven't checked the pressure sensor or vacuum lines myself – I'm not sure where to find them on this engine. How can I diagnose the bypass valve? Any advice on finding a vacuum leak, besides listening for hissing?
dominik_schmitz1
If you're not familiar with the engine layout, investigating yourself might cause more harm. A vacuum leak is hard to pinpoint without the right tools. Assuming the air filter is okay, I'd guess a defect in a vacuum switching valve, given the symptoms and the car's age. A shop should diagnose it quickly, as it relates to boost pressure control. It's best to have it checked professionally to avoid bigger problems.
gretameier54 (community.author)
I took it to the workshop, and you were right! It was a faulty vacuum switching valve. The repair cost 140€. The car runs like new now. Thanks for the advice!
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RENAULT
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TWINGO
dominik_schmitz1
Boost pressure issues on a relatively new Twingo aren't ideal. Has the car been regularly serviced? When did you last check the pressure sensor or vacuum lines for leaks? Could it be a faulty bypass valve? Is there any turbo lag or hissing sound?