Ford focus fault code?

I have a 2009 Ford focus 1.6 tdci 109bhp. It was left lying up for a month and when I went back to it, it gave a check engine light. When I scanned the codes it gave the code p0033- Turbo Charger Bypass Valve Control Cercuit. From reading what it might be, I changed the boost control sensor and the other air flow... show more I have a 2009 Ford focus 1.6 tdci 109bhp. It was left lying up for a month and when I went back to it, it gave a check engine light. When I scanned the codes it gave the code p0033- Turbo Charger Bypass Valve Control Cercuit. From reading what it might be, I changed the boost control sensor and the other air flow sensor along with it and the light stayed off for a while but came back on. I'm thinking of cleaning the boost pressure control solenoid and checking the connections? Any help is appreciated. It's driving fine, and had no light before I left it sitting for the few weeks
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