Are OBD scanners compatible with all vehicles?

No, OBD scanners are not compatible with all vehicles. The compatibility of an OBD scanner depends on the type of OBD system your vehicle uses. There are two main types of OBD systems - OBD-I and OBD-II. OBD-I systems were used in vehicles manufactured before 1996, while OBD-II systems were introduced in vehicles made from 1996 onwards. OBD-II scanners are more widely compatible as they work with most vehicles post-1996, including cars, SUVs, trucks, and hybrids. However, even within OBD-II, there may be variations in protocols and connector types used by different vehicle manufacturers. It is important to check the scanner's compatibility with your specific make and model before purchasing to ensure it will work effectively on your vehicle.