Whether your car has been operating strangely, has a dashboard light on, or needs towing, a reputable mechanic will start their assessment by running a diagnostics test on the vehicle. The information they learn from your car’s computer system can indicate the source of the issue. If you are unfamiliar with automotive diagnostics, a few common questions are answered below.

4 FAQ About Diagnostic Testing

What is a diagnostic test?

Modern vehicles increasingly rely on sensors, microchips, and computer processors to monitor engine performance, electrical systems, emissions, and other essential systems. Sensors constantly monitor the car’s performance and collect data. They can cause a dashboard light to go on when they register a problem. A diagnostic test lets a mechanic access data about the issue.

How does it work?

A diagnostic test checks every chip and sensor simultaneously to see which—if any—is registering a fault. It looks for error codes and manufacturer notices. The results tell a mechanic what is wrong with the vehicle or can at least point them in the right direction. 

What systems does a diagnostic test examine?

Auto diagnostics are tied to every critical vehicle system. If there is a problem with the transmission, ignition coil, exhaust system, brakes, throttle, or even the gas cap, the sensors will make a note of it and store the information. The test will reveal any faults that have been picked up.

How long does a diagnostics test take?

The diagnostics test involves attaching a code reader to the vehicle's computer system and downloading the information it contains. This only takes a matter of minutes, although the technician may also need time to cross-reference any error codes to determine their meaning.

If your car has been acting strangely, bring it to Robert Young's Auto & Truck, the premier auto towing service and repair shop in Roanoke, VA. They are family-owned and -operated and have served the Roanoke Valley since 1982. They specialize in emergency towing and roadside assistance but also offer computer diagnostics, oil changes, transmission service, and electrical repair. Visit their website or call (540) 982-3809 to schedule diagnostic service, towing, or repairs.