The Autel MaxiCOM MK808Z (and the closely related MK808S) is positioned as an advanced, professional-grade OBD2 scanner that goes far beyond the basic code readers typically available to consumers. The term “OBD2 scanner” is broad, but the MK808Z represents the modern, high-tier version of this tool.
Here is a breakdown of the key features that define the MK808Z as an advanced OBD2 scanner and explain why it provides excellent value for both serious enthusiasts and professional mechanics:
1. Beyond the Engine: All-System OBD2 Diagnostics
A basic OBD2 reader only accesses the Powertrain Control Module (PCM) to read generic “P-codes” that trigger the Check Engine Light (CEL). The MK808Z, however, is a Full-System Scanner.
| System Access Feature | Description | Diagnostic Advantage |
| Complete System Scan | Reads and clears all available modules in the vehicle, including: ABS (Anti-lock Brakes), SRS (Airbag), Transmission, BCM (Body Control Module), HVAC (Climate Control), TPMS (Tire Pressure), and more. | Pinpoints problems outside of the engine, such as brake system faults (C-codes) or airbag issues (B-codes) that a cheap scanner can’t even see. |
| Manufacturer-Specific Codes | Accesses codes unique to the vehicle manufacturer (e.g., U1000 on a Nissan or B1421 on a Toyota). | Provides far more detail than generic codes, significantly reducing diagnostic time. |
2. The Power of Bi-Directional Control (Active Tests)
This is the feature that truly separates the MK808Z from mid-range tools. Bi-Directional Control (or Active Test) means the scanner can send commands to the car’s ECUs, not just read data from them.
| Feature | Real-World Application | Value for Mechanics |
| Component Actuation | Command the fuel pump, cooling fan, specific injectors, lights, or solenoids to turn ON or OFF from the tablet. | Allows for rapid verification of component functionality without complex wiring/disassembly, confirming if a part is electronically dead or if the control module is faulty. |
| Electronic Brake Bleeding | Actuates the ABS motor and valves to force air out of the brake lines on vehicles requiring electronic brake service. | Essential procedure for safe brake maintenance on vehicles with Electronic Parking Brakes (EPB) or specific ABS systems. |
3. Advanced Service and Reset Functions
Modern vehicle maintenance requires a scanner to reset complex electronic systems after parts are replaced. The MK808Z supports over 28 Service Functions, which are crucial for OBD2 compliance and post-repair procedures:
- Oil Reset: Turns off the service reminder light.
- EPB (Electronic Parking Brake) Service: Retracts and releases the electronic calipers for brake pad replacement.
- SAS (Steering Angle Sensor) Calibration: Recalibrates the sensor after steering or suspension work.
- BMS (Battery Management System): Registers a new battery with the car’s computer to ensure proper charging and battery life.
- DPF (Diesel Particulate Filter) Regeneration: Forces the cleaning cycle for diesel vehicles.
- Injector Coding: Programs the ECU with the flow rate codes of new fuel injectors.
4. Hardware and Performance: The “Z” Upgrade
The MK808Z’s latest hardware ensures the speed and responsiveness required for professional use:
- Android 11 OS & 1.8 GHz Quad-Core CPU: Delivers rapid boot times and quick data processing.
- 4GB RAM / 64GB Storage: Allows for smooth, lag-free live data streaming and ample space for vehicle software.
- Dual-Band Wi-Fi (2.4 & 5 GHz): Provides fast and stable Over-The-Air (OTA) software updates.
5. Seamless Connectivity & Compatibility
- FCA AutoAuth Support: Allows direct, secured access to the Security Gateway Module (SGW) on modern Chrysler, Dodge, Jeep, and Fiat vehicles, eliminating the need for a bypass cable—a must-have for the US market.
- Live Data Graphing: Displays data from multiple sensors (PIDs) simultaneously in an easy-to-read graph format, which is critical for diagnosing intermittent issues (e.g., comparing O2 sensor voltage to fuel trims).
- Wireless Diagnostics (MK808Z-BT only): While the standard MK808Z is wired, the MK808Z-BT version adds a VCI (Vehicle Communication Interface) for wireless diagnosis, allowing the technician to use the tablet away from the OBD2 port.
In summary, the Autel MaxiCOM MK808Z is a high-powered, professional-level OBD2 scanner because it offers:
- Full System Access (not just the engine).
- Bi-Directional Control (Active Tests).
- Comprehensive Service Resets (28+ functions).
- Modern, Fast Hardware for efficient operation.
