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2001 996 C4 Check Engine Light Code 1411

Fuel System

Vehicle Information: Model: 996 C4; Year: 2001; Body Type: Cabriolet; Total Mileage: 55,000;

My check engine light comes on sporadically after I refuel. Never right after I refuel but usually a few days later. Occassionally it will go a tank or 2 of gas before it comes back on again. I get a fault code 1411 Engine Controller. We replaced the gas cap and the 2 secondary air injection valves. The car runs great but the engine light is driving me nuts.I have checked the Q & A site but there's nothing that addresses my problem specifically.

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