For car enthusiasts and DIY mechanics, having the right diagnostic tools can be the difference between a quick fix and a costly trip to the shop. When it comes to in-depth diagnostics and control, a bidirectional OBD2 scanner is a game-changer. One popular option on the market is the Autel MS906TS. But does it live up to the hype, and could it be considered one of the Best Bidirectional Obd2 Scanners available? Let’s dive into a real-world user experience with this tool.
The original poster of this review shares their experience with the Autel MS906TS, a tool they purchased about four years ago for around $1300. Positioned as a step above basic scanners, the MS906TS boasts impressive capabilities, stopping just short of module coding. This user, a DIYer working primarily on European cars, opted for this level of functionality to avoid the complexities and subscription costs associated with manufacturer data needed for module coding.
Why Choose a Bidirectional OBD2 Scanner?
Before we delve deeper into the MS906TS, it’s important to understand what makes a bidirectional scanner so valuable. Unlike basic OBD2 scanners that primarily read trouble codes and display live data, a bidirectional scanner offers two-way communication with your vehicle’s computer. This advanced capability allows you to:
- Perform Active Tests: Command components to activate, like turning on the fuel pump, cycling ABS motors, or retracting electronic parking brakes. This is crucial for pinpointing component failures.
- Execute Special Functions: Carry out tasks such as resetting service lights, performing throttle body adaptations, steering angle sensor resets, and diesel particulate filter (DPF) regeneration.
- System Diagnostics: Go beyond reading codes and delve into specific systems to diagnose issues more effectively.
For DIYers tackling more complex repairs, especially on modern vehicles with intricate electronic systems, a bidirectional scanner is often an essential tool.
Autel MS906TS in Action: A Focus on European Makes
The user in question primarily uses their Autel MS906TS on European vehicles, including BMW, Mercedes-Benz, and Range Rover. This is a significant point, as European cars often have more complex systems that benefit greatly from the advanced functions of a bidirectional scanner.
- Mercedes-Benz: This is where the MS906TS saw the most action. The user highlights its effectiveness in working on air suspension systems, diagnosing NOx sensors and DEF (Diesel Exhaust Fluid) heater issues, and tackling other general maintenance. Air suspension systems, in particular, can be challenging to diagnose without bidirectional control to activate and test components.
- BMW: For BMWs, the tool was primarily used for routine maintenance tasks like resetting service lights and assisting with brake work. While these tasks might be achievable with less advanced scanners, the MS906TS provides a more comprehensive approach.
- Range Rover: The MS906TS proved valuable in diagnosing DPF problems on a Range Rover. It was also used for relearning throttle body calibrations and activating various solenoids to effectively track down emissions-related fault codes. The ability to activate solenoids and monitor live data streams is a key advantage of bidirectional control for emissions system diagnosis.
The Power of Live Data and Graphing
Across all vehicle brands, the user emphasizes the invaluable nature of live data and graphing functions. Bidirectional scanners excel at displaying real-time data from various sensors and systems within the vehicle. The graphing capability takes this a step further, allowing users to visualize data trends over time. This is incredibly helpful for:
- Identifying Intermittent Faults: Spotting sensor readings that fluctuate erratically or fall out of specification under certain conditions.
- Analyzing System Performance: Observing how different components interact and respond to changes in engine load or driving conditions.
- Confirming Repairs: Verifying that sensor readings and system parameters are within normal ranges after a repair is completed.
Considerations and Drawbacks
While the user’s experience with the Autel MS906TS is largely positive, they do point out a couple of important considerations:
- Cost of Updates: The initial purchase includes updates for a limited period (two years in this case). Subsequent updates can be expensive, costing roughly half to two-thirds of the tool’s original price. For DIYers, this ongoing cost is a significant factor to weigh. If you primarily work on older vehicles, the need for frequent updates might be less critical.
- Lack of Instructions: The user notes that the tool lacks comprehensive instructions. Navigating the menus and functions can require trial and error, as different manufacturers implement diagnostic protocols in their own way. This learning curve is more related to the complexity of automotive diagnostics in general and less a specific fault of the Autel tool itself, but it’s a reality users should be prepared for.
Is the Autel MS906TS the Right Bidirectional Scanner for You?
The Autel MS906TS, based on this DIY user’s experience, appears to be a robust and capable bidirectional OBD2 scanner, particularly well-suited for European vehicles. Its ability to perform active tests, special functions, and provide in-depth live data makes it a valuable tool for tackling a wide range of diagnostic and repair tasks.
However, the cost of updates and the initial investment are significant factors. For DIYers who work on a variety of vehicles, especially European makes, and are comfortable with a bit of a learning curve, the MS906TS could be a worthwhile investment. If budget is a primary concern or if you mainly work on older vehicles or perform basic diagnostics, other bidirectional scanners at lower price points might be more suitable.
Ultimately, determining the “best” bidirectional OBD2 scanner depends on individual needs, budget, and technical expertise. The Autel MS906TS stands out as a powerful option in the mid-range category, offering a compelling balance of features and performance for serious DIYers and professional technicians alike.
