1. Introduction
The Dollarfix DF65 is a professional OBD2 diagnostic tool designed to provide comprehensive vehicle diagnostics and maintenance functions. It features a 5-inch HD touch screen, a 4-core Cortex chip, and 2+32GB of storage, ensuring efficient and reliable performance. This device supports 4-system diagnosis (ABS, SRS, ECM, TCM) and 10 essential reset functions, making it an indispensable tool for automotive enthusiasts and professionals alike.
Key capabilities include reading and clearing fault codes, displaying live data streams, performing various system tests, and offering lifetime free updates via Wi-Fi. The DF65 is designed for ease of use, offering a plug-and-play experience and supporting 18 languages for a global user base.

Figure 1: Dollarfix DF65 Overview with Main Features
2. Key Features
- Professional 4-System Diagnosis: Supports Anti-lock Braking System (ABS), Supplemental Restraint System (SRS/Airbag), Engine Control Module (ECM), and Transmission Control Module (TCM) for reading/clearing codes, live data, and ECU information.
- 10 Most Useful Reset Services: Includes Oil Lamp Reset, Electronic Parking Brake (EPB) Reset, Steering Angle Sensor (SAS) Reset, Tire Pressure Monitoring System (TPMS) Reset, Electronic Throttle System (ETS) Reset, Injector Coding, ABS Bleeding, Airbag Reset, Gearbox Reset, and Diesel Particulate Filter (DPF) Regeneration.
- Enhanced OBD2 Functions: Full OBD2 modes including Read Codes, Erase Codes, Live Data Stream, EVAP System Test, On-Board Monitor Test, View Freeze Frame, O2 Sensor Test, Vehicle Information (VIN, CINs, CVNs), I/M Readiness, and DTC Code Look-up.
- 4-in-1 Live Data Display: View up to four parameters simultaneously in graphical format for easy analysis.
- Auto VIN Scan: Automatically identifies vehicle information for streamlined diagnostics.
- Lifetime Free Updates: Software updates are available for free via Wi-Fi.
- User-Friendly Interface: 5-inch HD touch screen with intuitive navigation.
- Robust Hardware: Equipped with a 4-core Cortex chip, 2+32GB storage, and a 3150mAh battery.
- Multi-Language Support: Supports 18 languages.
- Professional Report Generation: Easy sharing and printing of diagnostic reports via Bluetooth or email.
3. Setup
The Dollarfix DF65 is designed for quick and easy setup. Follow these steps to begin your diagnostic process:
- Plug into OBD2 Port: Locate your vehicle's OBD2 diagnostic port, typically found under the dashboard on the driver's side. Connect the DF65's diagnostic cable to this port.
- Turn on the Car: Ensure your vehicle's ignition is in the 'ON' position or the engine is running, as required for the specific diagnostic task.
- Start Diagnosis: The device will power on automatically. Follow the on-screen prompts to select your desired diagnostic or reset function.

Figure 2: Easy Setup Steps
4. Operating Instructions
4.1 Full OBD2 Functions
The DF65 provides comprehensive OBD2 functionality to help you diagnose engine-related issues:
- Read Codes: Displays current, pending, and permanent Diagnostic Trouble Codes (DTCs) from the OBD system.
- Erase Codes: Clears detected fault codes and turns off the Check Engine Light.
- Live Data Stream: View real-time data parameters from the vehicle's computer module(s). Up to 4 parameters can be displayed simultaneously in a graphical format for easy analysis.
- Freeze Frame: Captures a snapshot of the vehicle's operating parameters at the moment a DTC is detected.
- I/M Readiness: Checks the status of emission-related monitoring systems to ensure the vehicle is ready for an emissions test.
- O2 Sensor Test: Performs O2 sensor tests to check fuel efficiency and vehicle emissions.
- On-Board Monitor Test: Reads the results of on-board diagnostic monitoring tests for specific components/systems.
- EVAP System Test: Initiates a leak test for the vehicle's EVAP (Evaporative Emission Control) system.
- DTC Lookup: Provides definitions for DTCs.
- Vehicle Information: Retrieves vehicle information such as VIN (Vehicle Identification Number), CINs (Calibration Identification Numbers), and CVNs (Calibration Verification Numbers).

Figure 3: Professional OBD2 Code Reader Functions
4.2 4-System Diagnosis
The DF65 extends its diagnostic capabilities to four critical vehicle systems:
- ABS (Anti-lock Braking System) Diagnose: Reads codes and checks health status via live data to pinpoint issues within the ABS system. After repairs, use the tool to clear the ABS warning light.
- SRS (Airbag System) Diagnose: Analyzes the Airbag/SRS system by reading fault codes to identify problems with airbags, sensors, or wiring. The tool can clear the airbag warning light after repairs.
- ECM (Engine System) Diagnose: Helps locate the cause of a flashing check engine light and clears it once the problem is resolved.
- TCM (Transmission System) Diagnose: Scans for fault codes within the automatic transmission system to diagnose issues and clear the transmission warning light after repairs.

Figure 4: Enhanced 4 Systems Diagnosis
4.3 10 Reset Services
The DF65 offers 10 hot maintenance reset functions to assist with common vehicle service tasks:
- Oil Lamp Reset Service: Resets the Engine Oil Life system after an oil change.
- Gearbox (Transmission) Reset: Performs adaptive learning for the transmission control unit (TCU) after repairs or replacements.
- EPB Electronic Park Brake Reset: Essential for maintaining the safety and efficiency of the electronic braking system.
- TPMS Tire Pressure Monitoring System Reset: Displays sensor IDs, allows input of new sensor IDs, and tests sensors.
- DPF Diesel Particulate Filter Reset: Works for DPF regeneration, component replacement teach-in, and DPF teach-in after replacing the engine control unit.
- SAS Steering Angle Sensor Reset: Clears fault memories and assists with steering angle sensor calibration.
- Airbag Reset: Resets airbag data to clear the airbag collision fault indicator.
- Injector Coding: Addresses issues with leaking or dead injectors by coding new injector values.
- Bleeding Reset: Used to exhaust air from the ABS braking system to restore brake sensitivity.
- Throttle Adaptation: Re-learns the throttle sensor position after clearing or repairing the throttle body.

Figure 5: 10 Most Useful Reset Services
4.4 Auto VIN Scan
The Auto VIN Scan feature simplifies the diagnostic process by automatically identifying your vehicle's information. This allows for quicker access to relevant diagnostic functions and facilitates sharing of diagnostic reports.

Figure 6: One-Touch Auto VIN Scan
4.5 Report Sharing and Printing
Diagnostic reports generated by the DF65 can be easily shared via email or Bluetooth, and also printed for your records.

Figure 7: Easy to Share & Print Report
5. Maintenance
To ensure the longevity and optimal performance of your Dollarfix DF65 diagnostic tool, please follow these maintenance guidelines:
- Cleaning: Regularly wipe the device with a soft, dry cloth. Avoid using abrasive cleaners or solvents that could damage the screen or casing.
- Storage: Store the device in its solid protective case when not in use to prevent physical damage. Keep it in a cool, dry place away from direct sunlight and extreme temperatures.
- Software Updates: Connect the device to Wi-Fi periodically to check for and install lifetime free software updates. This ensures you have the latest vehicle coverage and diagnostic features.
- Battery Care: Charge the internal 3150mAh battery regularly, even if not in frequent use, to maintain battery health. Avoid fully discharging the battery for extended periods.
6. Troubleshooting
If you encounter issues with your Dollarfix DF65, consider the following common solutions:
- Device Not Powering On: Ensure the device is properly connected to the vehicle's OBD2 port and the vehicle's ignition is on. Check the internal battery charge level.
- Connection Issues: Verify that the diagnostic cable is securely connected to both the DF65 and the vehicle's OBD2 port.
- Function Not Working for Specific Car: Not all reset functions or system diagnoses are compatible with every vehicle model. Always verify compatibility by providing your car's brand, model, and year to the manufacturer's support or checking their compatibility list.
- Error Messages: If an error message appears, refer to the device's on-screen instructions or the full digital manual for specific guidance. Ensure all necessary conditions (e.g., engine running, ignition on) are met for the selected function.
- Software Glitches: Perform a software update via Wi-Fi to resolve potential bugs or improve performance.
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | Dollarfix DF65 Diagnostic Tools |
| Item Type | Engine Analyzer |
| Screen | 5-inch HD Touch Screen |
| Processor | 4-Core Cortex Chip |
| Storage | 2GB RAM + 32GB ROM |
| Battery | 3150mAh |
| Voltage | 3.8V |
| Special Features | Wi-Fi, Auto VIN Scan, Live Data Stream in Graph |
| Software Version | 2024 Dollarfix DF65 OBD2 Scanner |
| Hardware Version | 2024 Dollarfix DF65 OBD2 Scanner |
| Item Weight | 1.5kg |
| Material | ABS |
| Certifications | CE, RoHS, FCC |
| Origin | Mainland China |
| Languages Supported | 18 Languages |
8. User Tips
- Verify Compatibility: Before attempting any diagnostic or reset function, always confirm compatibility with your specific vehicle. Provide your car's brand, model, and release year (e.g., Audi, A3, 2020) to the manufacturer if you have doubts.
- Function Limitations: Be aware that not all reset functions are universally applicable to all car models. Some advanced functions, like DPF regeneration for specific diesel lines (e.g., Jeep), may require specific software versions or vehicle support.
- Japanese Car Coverage: The tool generally supports a wide range of vehicles, including many Japanese car models. For specific Japanese car compatibility, it's best to check with the manufacturer.
- Keep Software Updated: Utilize the lifetime free Wi-Fi updates to ensure your device has the latest vehicle data and diagnostic capabilities.
9. Warranty & Support
The Dollarfix DF65 comes with a commitment to customer satisfaction. The device includes lifetime free software updates, ensuring your tool remains current with the latest vehicle technologies and diagnostic protocols.
For any technical assistance, troubleshooting, or inquiries, please contact the manufacturer's customer support. They offer 24/7 online service to address your needs promptly.
Video 1: Dollarfix DF65 Product Demonstration - Shows features like internal components, OBD2 functions, system diagnosis, reset functions, and multi-language support.


