Hello all,
Ive owned my 17 sonic for almost 2 years now and i daily it about 120 miles a day for work. Its been an ok car so far. It has trouble in the winter time with the dreaded po299 dtc for turbo underboost. Im guessing the cac or hoses have a hole in them causing excessive moisture in the intake system and freezing up. It happens every winter here in SD. On particularly frosty days. Ive had the light on for this once already this December when humidity was high and temp was in the low 20s. It has since warmed up now and "fixed itself" lol. Its out of warranty now so i dont take it in anymore. Anywho... ill be on this forum to pickup some good deals on parts and maybe a little info once in awhile. Thanks!
Ive owned my 17 sonic for almost 2 years now and i daily it about 120 miles a day for work. Its been an ok car so far. It has trouble in the winter time with the dreaded po299 dtc for turbo underboost. Im guessing the cac or hoses have a hole in them causing excessive moisture in the intake system and freezing up. It happens every winter here in SD. On particularly frosty days. Ive had the light on for this once already this December when humidity was high and temp was in the low 20s. It has since warmed up now and "fixed itself" lol. Its out of warranty now so i dont take it in anymore. Anywho... ill be on this forum to pickup some good deals on parts and maybe a little info once in awhile. Thanks!
