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larskoenig10

Clio Boost Pressure Control Fault

Experiencing a boost pressure control fault with my 2005 Renault Clio, gasoline engine. Check engine light is on, car has lost power, engine response is sluggish, and fuel consumption is up. I've checked for vacuum leaks. Could it be a faulty bypass valve or boost solenoid? Any ideas where to start? The car has 113999 km on it.

Summary of the thread

A 2005 Renault Clio with a gasoline engine is experiencing a boost pressure control fault, leading to a check engine light, power loss, sluggish engine response, and increased fuel consumption. The issue may be due to a faulty bypass valve or boost solenoid, but a vacuum switching valve is also suggested as a potential cause. After consulting with a mechanic, the problem was confirmed to be a faulty vacuum switching valve, which was replaced, resolving the issue.

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4 comment(s)

HansRacer

Sounds familiar. I had similar issues with my old Saab 9-3. Turned out to be a vacuum switching valve. Check that, and also consider the pressure sensor. Any compressor surge?

larskoenig10 (community.author)

Thanks! Vacuum switching valve, eh? Where is that located, and how can I test it? I haven't noticed any distinct compressor surge, but the performance is definitely off. Is there a way to test the pressure sensor?

HansRacer

On my Saab, it was near the turbo, but location varies. Testing involves a multimeter and checking resistance values against specs. Honestly, save yourself the headache and have a workshop check it. They have the right tools. It was the best choice for me.

larskoenig10 (community.author)

Appreciate the advice. Took it to a local mechanic, and you nailed it – faulty vacuum switching valve. Replaced it, and the Clio is back to its old self. Repair cost me 140€.

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RENAULT

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CLIO