I Washed Engine gave "Antipollution Fault" Error

Yesterday I washed my car's engine. If I said I washed it, it was not a professional wash. The man wrapped the electronic parts in the bag, first poured degreasing medication, then cleaned the dust with air compressor, then cleaned with foam and pneumatic water. I started the engine to dry. Then when I got into the car, I saw that it gives "Antipollution Fault" error. Almost never had this error before. I went home, I said it would be okay when I woke up in the morning, but when I woke up in the morning it wasn't. I am so bored. I know this error is not a very harmful mistake. But it is very annoying, my old vehicle was & nbsp; 307 with LPG, and he would constantly give this error. He had a trauma on me. Now when this car gave this error, my old car came to my mind and I was bored. Why can this happen and how can I fix it? & Nbsp;

teacher, look at the oxygen probe, maybe it was damaged if fresh water came, or one of the sensors could be damaged & nbsp; & nbsp;