For car owners and automotive enthusiasts, understanding your vehicle’s health is paramount. Modern vehicles are complex systems, and when the check engine light illuminates or any other warning appears, a reliable scan tool becomes indispensable. The quest then begins: what is the Best Scan Tool For Car That Can Read Everything? This question often leads to confusion as the market is flooded with options, from basic code readers to professional-grade diagnostic tools. This article will explore what to look for in a comprehensive scan tool and guide you in making the right choice.
Understanding Your Diagnostic Needs: Beyond Basic Code Reading
Entry-level scan tools, while affordable, often have limitations. They might effectively read basic engine codes ( Powertrain – P codes), but fall short when it comes to diagnosing issues in other critical systems like:
- ABS (Anti-lock Braking System): Problems here can compromise safety significantly.
- SRS (Supplemental Restraint System – Airbags): Ensuring your airbags are functioning correctly is crucial.
- Transmission Control Module (TCM): Transmission issues can lead to drivability problems and costly repairs.
- Body Control Module (BCM), and other modules: Modern cars have numerous electronic modules controlling various functions, and a comprehensive scan tool should access them all.
If you’re aiming for a scan tool that truly reads “everything,” you need to look beyond basic OBDII code readers. These entry-level devices may leave you in the dark when issues arise in systems outside the engine and emissions.
Key Features of a Scan Tool That Reads “Everything”
To effectively diagnose modern vehicles, the best scan tool for car that can read everything should possess these capabilities:
All-System Diagnostics
This is the core requirement. The tool should be able to communicate with and retrieve diagnostic trouble codes (DTCs) from all electronic control modules in your vehicle, not just the engine control unit (ECU). This includes ABS, SRS, Transmission, Body, Chassis, and more, depending on your vehicle’s make and model.
Enhanced Protocol Support
Beyond basic OBDII protocols (like CAN, ISO, PWM, VPW), a comprehensive scan tool should support manufacturer-specific protocols. This enhanced support allows deeper access to vehicle systems and more detailed diagnostics, especially for brands like Chrysler, Ford, GM, European, and Asian vehicles.
Bi-Directional Control (Active Tests)
Reading codes is only half the battle. Bi-directional control allows you to send commands to the vehicle to perform tests and verify component functionality. For example, you might be able to:
- Activate and deactivate solenoids, relays, or actuators.
- Cycle ABS pump and valves.
- Perform injector tests.
- Turn cooling fans on and off.
This feature is invaluable for pinpointing the root cause of a problem and confirming repairs.
Live Data Streaming and Data Logging
Monitoring live data parameters from various sensors and modules in real-time is crucial for diagnosing intermittent issues and understanding system behavior under different operating conditions. The ability to log this data for later analysis enhances diagnostic capabilities.
Freeze Frame Data
When a DTC is set, freeze frame data captures a snapshot of sensor values and system conditions at the moment the fault occurred. This information provides valuable context for diagnosis.
Service Functions and Reset Capabilities
Many advanced scan tools offer service functions beyond basic diagnostics. These can include:
- Oil reset.
- Electronic Parking Brake (EPB) reset.
- Battery Management System (BMS) reset.
- Throttle body adaptation.
- Steering Angle Sensor (SAS) reset.
- DPF regeneration.
These functions can save you trips to the mechanic for routine maintenance tasks.
Regular Updates
The automotive industry is constantly evolving, with new models and technologies emerging every year. A scan tool that receives regular software updates ensures compatibility with newer vehicles and access to the latest diagnostic capabilities.
Popular Brands and Models Known for Comprehensive Coverage
While “best” is subjective and depends on budget and specific needs, some brands are renowned for their comprehensive coverage and features. Based on user feedback and professional reviews, brands like Autel, Launch, and Foxwell consistently appear as strong contenders in the market for scan tools that read “everything”.
Autel scanners, particularly models in the MaxiSYS series (like MS906BT, MS908, MS909, etc.), are highly regarded for their extensive vehicle coverage, all-system diagnostics, bi-directional controls, and advanced functions. They often provide near-OE (Original Equipment) level diagnostics and are popular among professional technicians and serious DIYers. While they can be an investment, the capabilities justify the cost for many users.
Launch also offers a range of professional-grade scan tools with comprehensive coverage and features, often competing directly with Autel in terms of functionality and vehicle support. Models like the X431 series are well-known in the automotive diagnostic community.
Foxwell provides a balance of features and affordability. While perhaps not as feature-rich as top-tier Autel or Launch models, Foxwell scanners often offer excellent all-system diagnostic capabilities and service functions at a more accessible price point. They can be a good option for users who need comprehensive coverage without the highest-end features.
Considering Older Vehicles (1999-2004 Chrysler/Dodge Example)
For owners of older vehicles, like the 1999-2004 Chrysler/Dodge models mentioned in the original discussion, compatibility is key. While OBDII was standardized in 1996, the depth of diagnostic access can vary. When choosing a scan tool for older vehicles, verify:
- OBDII Compliance: Ensure the tool explicitly states compatibility with OBDII vehicles from the late 1990s and early 2000s.
- Chrysler/Dodge Specific Coverage: Check if the tool lists enhanced diagnostics for Chrysler and Dodge vehicles within that year range. Some manufacturers may have slightly different diagnostic protocols during this period.
- User Reviews and Forums: Look for online reviews and forums where users discuss their experiences using specific scan tools on similar vintage Chrysler/Dodge vehicles. Real-world feedback can be invaluable.
Making the Right Choice
Finding the best scan tool for car that can read everything requires careful consideration of your diagnostic needs, vehicle types you work on, and budget. While basic code readers have their place, for true comprehensive diagnostics, investing in a more advanced all-system scan tool from reputable brands like Autel, Launch, or Foxwell is often necessary. Research specific models, compare features, read user reviews, and choose a tool that provides the coverage and functionality you need to keep your vehicles running smoothly and safely.
