Hello I bought an Alfa 147 1.6 TS in May 2013 and gave it an LPG system. Now I was torn about 5 months ago by the timing belts and I left everything new. Since the car was finished I was told that my gas potention meter is defective and the engine is only running on emergency program. I had it changed and nothing changed. the Alfa workshops are in despair because always the following error codes light up. 220, 1221P maybe you can someone say what these have to mean. Many say that these errors come from the gas system but I have already clarified this since I had the car checked in the workshop. I am in despair because I have been standing there for about 5 months without a car and no one knows what it is. please help me!!!!!!!!!!!!!! MFG