Just took S3 a quick hot run was originally try log my boost but end up see services light warning up .. so i use VAG-com and got following result. 17863 - Exhaust Gas Temp Sensor 1 (G235): Implausible Signal P1455 - 35-10 - - - Intermittent 17864 - Exhaust Gas Temp Regulation for Bank 1: Limit Reached P1456 - 35-10 - - - Intermittent That is 2nd time i saw 17863 after i clear code at first time. now it also show up another 17864. Looks like EGT problem. Do anyone has experience on it before. I wonder it is mostly just EGT sensor or something else and does anyone know the part number i can order for S3 2001 AMK engine ?