Hi, Few days ago CEL on my 2008 lancer GTS (FED) lighted up. The error codes are P0107 (bank 1) and P0171. About 10 days before that I removed K&N Typhoon SRI and installed back the original intake (only with K&N drop in folter inside). At the same time I uploded default RRM Piggyback fuel MAP for my car. Everything was fine for these 10 days and than during fast accelerating CEL showed up. Does anyone has any ideas what could it be? Is it MAF, MAP or O2 sensor? Thanks.