Computer diagnostics (OBD scanner)

Every modern car is managed by electronic control units (ECUs) that monitor the engine, transmission, brakes, air conditioning and dozens of sensors in real time. When something falls outside the expected range, the ECU logs a fault code (DTC) and often turns on a dashboard light. Computer diagnostics means connecting a scanner to the vehicle’s OBD-II port and reading that data.

At Mr. Service we use latest-generation scanners that go beyond the generic code: they access each brand’s specific modules, read live sensor data and the fault history. That lets us understand not just “what” failed, but “why”.

The same symptom can have several causes. Replacing parts “on a guess” is expensive and the problem usually returns. Proper diagnosis saves money because it points the repair at the real cause — you pay for what the car needs, not for trial and error.

It is also the starting point for the quote: with the diagnosis in hand, we send a detailed estimate and only start work after your approval.

A check-engine light, rising fuel consumption, loss of power, starting problems, unusual noises or vibrations, and any dashboard warning are all good reasons. On imported cars a diagnostic matters even more, because it needs a scanner that reads the brand’s modules.