For any home mechanic, an Onboard Diagnostic Scanner is now as vital as a wrench set. These devices are crucial for deciphering engine fault codes, which is essential for diagnosing and fixing problems in modern cars and vans.
Are onboard diagnostic scanners a worthwhile investment? Absolutely. They are the quickest way to pinpoint automotive issues. Without an onboard diagnostic scanner, you would need to visit a professional garage just to identify the fault code. Considering that labor costs at independent garages can average around $60-$100 per hour, owning a scanner quickly pays for itself. When you combine an onboard diagnostic fault code reader with resources like online repair guides, you gain the power to diagnose and repair many common mechanical and electrical problems right in your own garage using basic tools.
There’s a wide array of onboard diagnostic scanners available on the market, but their core function remains consistent. While prices can vary significantly, from budget-friendly options around $20 to more advanced units costing several hundred dollars, all capable scanners should perform these essential tasks:
- Establish communication with the vehicle’s computer system
- Read and interpret diagnostic fault codes
- Clear or reset fault codes
It’s important to note that many basic onboard diagnostic scanners may not handle tasks like turning off service lights for systems such as ABS or SRS, or resetting oil life monitors. However, more comprehensive guides and software can often provide procedures for these resets.
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Understanding Onboard Diagnostics (OBD)
OBD stands for on-board diagnostics. It refers to a standardized port in your vehicle that allows access to the car’s computer system. This port, often resembling a trapezoidal connector, has been a standard feature in all gasoline passenger cars sold in the US since 1996, and for diesel vehicles since 2004. This standard 16-pin connector is universally known as OBD2. In Europe, it’s often referred to as EOBD, but functionally, they are the same.
The OBD port also conveniently provides power, eliminating the need for a separate power source for your onboard diagnostic scanner, whether batteries or a power cable. This makes using the scanner straightforward and user-friendly directly in your vehicle.
