## Calculating Your Return on Investment Investing in your own OBD2 scanner is one of the most effective ways to reduce long-term vehicle maintenance costs. Most repair shops charge a "diagnostic fee" just to plug in a scanner and report the error codes, regardless of whether they perform the repair.
### The Economics of DIY Diagnostics To calculate your payback, we compare the one-time purchase price of your scanner against the recurring cost of professional diagnostic services.
* Diagnostic Fees: These typically range from $80 to $150 per visit depending on your region and the complexity of the vehicle. * The Payback Period: If you visit a shop twice a year for a "Check Engine" light, a $150 scanner will pay for itself in just one or two trips.
### Maximizing Value The true value of a scanner extends beyond the initial diagnostic fee. By knowing exactly which part is failing (e.g., an O2 sensor or a mass airflow sensor), you can purchase the part yourself and perform the repair, avoiding the significant labor markups charged by professional shops. When using this calculator, consider how many vehicles are in your household; a single tool can serve an entire fleet, drastically shortening the payback period compared to paying for individual diagnostic services for every car you own.