As a car owner or automotive enthusiast, you might have questions about OBD2 scanners. These diagnostic tools are invaluable for understanding and addressing car issues. Here are answers to frequently asked questions about OBD2 scanners to help you choose the best one for your needs.
What Does an OBD2 Scanner Do?
An OBD2 scanner, also known as a diagnostic scan tool or code reader, retrieves diagnostic trouble codes (DTCs) from your car’s computer system. These codes indicate problems or malfunctions within the vehicle’s systems. For example, if your engine misfires, the system might log a code like P0300, indicating a “cylinder misfire detected.” This information helps you understand what’s wrong with your car and where to begin troubleshooting.
Which OBD2 Scanner is the Best?
Determining the “best” OBD2 scanner depends largely on your specific needs and budget. However, for a balance of price and features, the iCarsoft CR Pro and CR MAX models are excellent choices. They offer a wide range of functions, user-friendly software, and often include free updates.
Alt text: iCarsoft CR Pro multi-brand OBD2 scanner displaying diagnostic information on its color screen.
For newer car models (approximately 2018 onwards), which are technologically more complex, brands like Autel provide broader vehicle coverage and advanced capabilities. Autel is a leading name in automotive diagnostics globally. While they come at a higher price point and often involve license fees for updates, tools like the Autel MX808 can diagnose newer Volvo or Volkswagen models (e.g., 2021) that some other scanners might not fully support.
Foxwell scanners represent a middle ground, offering better vehicle coverage than iCarsoft but not as extensive as Autel, typically at a more moderate price.
Ultimately, iCarsoft, Autel, and Foxwell each cater to different user needs and budgets within the OBD2 scanner market.
What OBD2 Code Reader Should I Buy?
This is a very common question, and the answer is subjective to your requirements. If we consider general needs without knowing your specific demands, we often recommend the iCarsoft CR MAX or CR Pro+. Autel scanners, particularly the popular Maxicheck MX808, are also highly regarded, especially for professional mechanics and workshops.
Alt text: Autel MaxiCheck MX808 professional OBD2 diagnostic tool with touchscreen interface and vehicle connector.
Another brand gaining prominence is Topdon. They have shown significant development recently, potentially becoming as popular as Autel. Topdon’s newer models like the Phoenix Smart and Phoenix MAX are high-performing diagnostic tools.
Which OBD2 Scanners Work with Volvo?
Volvo vehicles are generally compatible with multi-brand scanners such as the iCarsoft CR Pro, CR MAX, Autel MX808, and others. You can also opt for brand-specific scanners. For Volvo, iCarsoft offers models like the VOL V1.0, VOL V2.0, and VOL V3.0. Functionally, there isn’t a software difference for Volvo diagnostics between the VOL V2.0 and the CR PRO/EU PRO/CR V2.0 (1+4). The same applies to the VOL V3.0, which shares software with the CR MAX for Volvo.
Are There OBD2 Scanners with English Language?
Yes, many OBD2 scanners offer multiple languages, including English. Models like the iCarsoft CR Pro, EU PRO, CR V2.0 1+4 and CR MAX typically include English. Similarly, Autel MX808, MD808 Pro, TS608, and Autel Maxisys models also support English.
It’s important to note that language support might not always be 100% translated. Translations are usually around 70-90%, with some text remaining in the original language (often English). Translation work is continuously ongoing for these devices.
Where Do You Plug in an OBD2 Scanner?
The OBD2 scanner connects to your car’s OBD2 port or connector. This port is usually located inside the cabin, under the dashboard on the driver’s side, often beneath the steering wheel. The OBD2 port became standard in 2001 for gasoline cars (and 2004 for diesel in Europe) and is required to be within 1 meter (approximately 3 feet) of the steering wheel’s center. Sometimes, it might be hidden behind a small cover.
How Do You Use an OBD2 Scanner?
To use an OBD2 scanner, ensure your car’s engine is turned off, but the ignition is in the “key on, engine off” (KOEO) position. Plug the scanner into the OBD2 port. Follow the scanner’s on-screen instructions, which might include selecting your vehicle’s make, model, and engine type. The scanner will then scan the vehicle’s computer system for fault codes, displaying any found codes and their descriptions on the screen.
What Does OBD Stand For?
OBD stands for On-Board Diagnostics. It’s a standardized system for vehicle self-diagnostics and reporting. Through the OBD system, you can access diagnostic trouble codes from the fault memory, read live data parameters from the engine and other systems, and perform some diagnostic tests. The OBD2 standard, mandatory in the USA from 1996 and in Europe from 2001 (gasoline), dictates the location of the diagnostic connector to be within 1 meter of the steering wheel center.
How Do I Know if My Car Has OBD2?
All cars manufactured for the US market since 1996 and for the European market since 2001 (gasoline) are OBD2 compliant and equipped with an OBD2 port. The OBD2 port is typically found under the dashboard, near the steering column, and sometimes covered by a small panel. Other possible locations include the center console or glove compartment.
How Much Does an OBD2 Check/Car Diagnostic Cost at a Workshop?
At a professional workshop or authorized dealership, a car diagnostic check using OBD2 can range from approximately $30 to $100 or more. Similarly, resetting a TPMS (Tire Pressure Monitoring System) light at a tire shop when changing between summer and winter tires can also incur a cost. Owning an OBD2 scanner can save you significant money over time and the inconvenience of scheduling workshop appointments for simple diagnostics.
How Do You Troubleshoot a Car Problem?
Car troubleshooting often begins by connecting a diagnostic tool, an OBD2 scanner, to the car and reading any stored fault codes. Sometimes, the problem is immediately apparent from the code description. In other cases, the codes provide mechanics with a starting point to understand the nature of the fault and where to investigate further.
Can I Diagnose My Car Myself?
Taking your car to a workshop for diagnostics can be expensive. With the right equipment, such as an OBD2 scanner, you can read the codes causing warning lights to illuminate yourself. Many times, the issues are relatively simple, like a faulty ignition coil or mass air flow sensor, which are parts you can often replace yourself.
What Functions Can Be Performed Through the OBD2 Port?
Generic OBD2 diagnostics primarily provide access to engine-related fault codes, live data, and ECU (Engine Control Unit) information. However, most of our OBD2 scanners also support manufacturer-specific diagnostics over enhanced protocols. This extended capability allows you to access systems beyond the engine, such as airbag, ABS (Anti-lock Braking System), comfort systems, lights, transmission, service light resets, and more. Advanced models can also perform adaptations (component configuration) of control units and active tests, where you can control vehicle components directly through the diagnostic tool.
Can I Reset the Check Engine Light Myself?
Yes, you can. The check engine light illuminates when there is a stored fault code in the engine control module. When you erase or clear this code using an OBD2 scanner, the check engine light will typically turn off, provided the underlying issue has been resolved or is intermittent.
How Do I Clear a Fault Code?
You clear or erase fault codes by selecting “Clear DTC” or “Erase DTC” (Diagnostic Trouble Code) from the menu on your OBD2 scanner. This command clears the fault memory in the car’s computer.
Which Fault Codes Cause a Failed Vehicle Inspection?
Vehicle inspections (like MOT or TÜV) will fail cars that have confirmed, active fault codes related to the Engine, ABS, or Airbag systems. The fault code must be active enough to illuminate the corresponding warning light on the instrument panel. This light is also known as the MIL (Malfunction Indicator Lamp). Stored or historical fault codes or codes in other systems generally do not cause an inspection failure.
What is VCDS and How Does it Compare?
VCDS (Vag-Com Diagnostic System) is a capable diagnostic tool, but it is primarily designed for VAG (Volkswagen Audi Group) vehicles. For a similar or even lower cost than VCDS, tools like the iCarsoft CR MAX offer diagnostic coverage for a much wider range of car brands, making them a more versatile choice for many users.
Yes, using an OBD2 scanner makes it straightforward to check and potentially resolve engine light issues. The check engine light can illuminate for numerous reasons, ranging from serious problems like low oil pressure to minor issues such as a vacuum hose leak or a failing ignition coil. If the engine light is flashing or blinking, this indicates a severe fault. In such cases, stop the car immediately and do not restart it until you have identified the problem. A solid yellow or amber engine light often indicates a less critical fault, and it might be safe to continue driving cautiously, but it’s always best to investigate the issue promptly.
