What is code 52 for the chevy sonic?

When You think of codes, You're probably usually thinking of OBD-II fault codes. However, that's not at all what "52" is on the Chevy Sonic. Instead, it's a maintenance reminder. Since the Sonic's engine has a timing belt, and Chevrolet recommends changing them every 100,000 miles, You'll get code 52 to at 100,000 miles to remind You that it's time to swap out the belt. Is this absolutely essential Probably not. You can clear the code and go about Your merry way. However, just know that a failed timing belt is absolutely no bueno. You're putting YourseLFAnd others in serious harm's way, so it's always best to perform the preventative maintenance and swap them out as recommended, due to routine wear and tear.