Basic Code Readers: Read/clear codes, show simple freeze‑frame. Best for budget, quick checks.
Mid‑Tier Scanners: Add live data (sensor streams), I/M readiness, graphing. Ideal for DIY owners.
Advanced/Bi‑Directional: Component tests, actuation, calibrations. For serious enthusiasts and pros.
Bluetooth Dongles + Apps: Great value, app‑driven features, require a phone. Quality varies.
• Vehicle Coverage: All 1996+ US vehicles support OBD‑II powertrain. ABS/SRS/manufacturer codes may require enhanced support.
• Live Data + Graphing: Crucial for diagnosing intermittent issues and verifying repairs.
• I/M Readiness: Shows if monitors are ready before an emissions test.
• Freeze Frame: Snapshot of conditions when a fault set—helps root‑cause.
• Update Support: Firmware/database updates extend tool life.
• Interface & Speed: Menu clarity, screen readability, and connection stability matter.
• LAUNCH Creader 3001 — budget wired reader for quick code checks.
• LAUNCH CRP123 — mid‑tier live data + ABS/SRS on many models.
This summary compares a budget reader and a mid‑tier scanner commonly considered by DIY owners.
• 3001: Read/clear codes, freeze frame, I/M, compact, low cost.
• CRP123: Adds broader live data, often ABS/SRS coverage on supported vehicles, larger screen.
Do I need bi‑directional controls? Only if you plan advanced tests (e.g., EVAP, actuator commands). For most DIY, mid‑tier is enough.
Are Bluetooth dongles reliable? Quality varies. Choose reputable brands and apps, verify data rates and stability.
Will it read ABS/Airbag codes? Only if the tool supports those modules for your make/model/year.
• See our full review of LAUNCH Creader 3001.
• See our full review of LAUNCH CRP123.
• Already have a code? Use the search above or visit the OBD‑II Codes Index.
