Choosing an OBD2 scanner depends on your skill level and diagnostic needs. Entry-level models focus on basic code reading, while professional tablets offer full-system diagnostics, bi-directional controls, and specialized functions like TPMS or ADAS calibration. Check the brand’s update policy and return window before buying.
An OBD2 scanner helps you read and clear trouble codes, view live data, and diagnose vehicle issues. But not all scanners are the same – features vary widely from basic code readers to advanced diagnostic tablets.
This guide uses published information from Autel US to help you compare key criteria. Focus on system coverage, bi-directional capability, update options, and ease of use to match a scanner to your skill level and vehicle type.
Who This Guide Is For
This guide is for car owners, DIY enthusiasts, and professional technicians. If you only need to check engine codes and reset the check engine light, an entry-level OBD2 scanner like the Autel MaxiLink ML619 is sufficient. If you work on multiple vehicle systems (ABS, SRS, transmission) or need advanced functions like bi-directional control and ECU coding, look at all-system diagnostic tablets such as the Autel MaxiDiag MD808 Pro or the Autel MaxiCOM MK808Z-TS.
Key Criteria to Consider
- System Coverage: Basic OBD2 scanners read generic powertrain codes. All-system scanners (e.g., Autel MaxiCheck MX900) can diagnose engine, transmission, ABS, SRS, and more.
- Bi-Directional Control: Enables you to activate components (e.g., fuel pump, windows) for testing. The Autel MaxiCOM MK808Z-TS offers wireless bi-directional scanning.
- Specialized Functions: Some models include TPMS service (e.g., MaxiCOM MK808Z-TS) or ADAS calibration support (e.g., MaxiSYS Ultra ADAS). Consider if you need these.
- Update Policy: Not all scanners come with free updates. Some Autel products offer 5-year free updates (e.g., MaxiCheck MX900, MaxiDiag MD808 Pro). Always check the brand’s update terms.
- Connectivity: Wireless Bluetooth interfaces (like the MaxiVCI V200) allow you to move around the vehicle while scanning.
Common Mistakes When Choosing an OBD2 Scanner
- Ignoring update costs: Some scanners require paid updates after a free period. Check if the model you’re considering includes updates in the purchase.
- Assuming all scanners cover all vehicle systems: Basic code readers only read OBD2 codes. If you need ABS, SRS, or other system diagnostics, choose an all-system model.
- Overlooking vehicle compatibility: Some scanners support only specific makes. Autel tablets typically cover American, Asian, and European vehicles, but verify for your specific car.
Questions to Ask the Brand Before Buying
- What is the warranty period for this scanner? (Autel’s warranty policy is not stated in the data – contact support at support@autel-us.com.)
- Are software updates included, and if so, for how long?
- Does the scanner support bi-directional controls and coding for my vehicle make?
- What is the return policy? (Autel offers 30-day returns for unused items with original packaging – see their refund policy.)
Examples from the Brands in the Data
- autel-maxilink-ml619-obd2-scanner-autel-scanner-upgraded-version-of-al519-al619-us-version-with-local-warranty-support – Entry-level OBD2 scanner for car owners and DIYers, covering ABS and SRS plus OBD2.
- autel-maxidiag-md808-pro-obd2-all-system-diagnostic-code-scanner – Handheld all-system scanner for technicians and DIYers, with 5-year free updates offered.
- autel-maxicheck-mx900-obd2-all-system-diagnostic-scannerus-ver-5-year-update-version-now-available-save-386 – Android-based all-system scanner with 5-year free updates, upgrade of MK808.
- autel-maxicom-mk808z-ts-android-11-us-version-with-local-warranty-support – Wireless bi-directional scanner with integrated TPMS service, designed for professional technicians and advanced DIY users.
Checklist Before You Order
- Confirm the scanner covers the systems you need (OBD2 only vs all-system).
- Check if free updates are included for a specific period (e.g., 1 year or 5 years).
- Verify that the scanner supports your vehicle make and model.
- Review the return policy: Autel US offers 30-day returns for unused items in original packaging; return shipping is free for defective items.
- Check shipping options: free standard shipping within the continental US (4–6 business days processing + delivery).
Frequently asked questions
What is the difference between an OBD2 code reader and an all-system diagnostic scanner?
An OBD2 code reader only accesses the engine control unit (ECU) and reads generic powertrain codes. An all-system scanner, like the Autel MaxiDiag MD808 Pro, can also communicate with other modules such as ABS, SRS, transmission, and more, providing deeper diagnostics.
Do I need a scanner with bi-directional control?
Bi-directional control lets you send commands to vehicle components (e.g., open a valve, cycle the fuel pump) to test them. It is useful for advanced troubleshooting and is available on models like the Autel MaxiCOM MK808Z-TS. If you only need to read and clear codes, a basic scanner suffices.
How long do software updates typically last?
Autel offers different update packages depending on the model. For example, the MaxiCheck MX900 and MaxiDiag MD808 Pro include 5-year free updates. Always check the product description for update terms, as some models may only include a 1-year update subscription.
What is Autel’s return policy for OBD2 scanners?
Autel US offers a 30-day return policy for items in unused condition with original packaging and proof of purchase. Returns are free for defective, damaged, or incorrectly shipped items. For non-quality returns, the customer pays return shipping. Contact support@autel-us.com to start a return.
Can I use a professional Autel scanner on my personal car?
Yes, professional tablets like the Autel MaxiSYS MS919 can be used on personal vehicles, but they require more training to operate than entry-level scanners. They provide full-system diagnostics and advanced functions that may be more than a typical car owner needs.
