Posted on 8/29/2025
Cars today are more complex than ever. What used to be mechanical systems are now controlled by sensors, modules, and computers that all communicate with one another. While this makes vehicles more efficient and reliable, it also means that when something goes wrong, it’s not always obvious. That’s where computer diagnostics come in. At Don’s Service Center in Terre Haute, IN, technicians rely on advanced scan tools to uncover issues that drivers can’t always see or hear. What Happens During a Diagnostic Test When your vehicle’s “check engine” light or other warning indicators appear, the first step is to connect it to a diagnostic scanner. This tool reads the trouble codes stored in the vehicle’s onboard computer. These codes serve as clues, indicating a system that isn’t functioning properly. For example, a code might show an issue with the oxygen sensor, fuel injectors, or ignition coils. The ... read more