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Are you having problems with your 2011 Proton Gen.2? Let our team of motoring experts keep you up to date with all of the latest 2011 Proton Gen.2 issues & faults. We have gathered all of the most frequently asked questions and problems relating to the 2011 Proton Gen.2 in one spot to help you decide if it's a smart buy.
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It would seem likely to be an air leak in the system, which you should look for. Perhaps a damaged hose, loose fitting, or something like that.