7 Best Diagnostic Scanners (2026 Review Guide)

If your check engine light just came on or you want to stop paying $150 every time a shop plugs in a reader, a capable diagnostic scanner pays for itself fast. After testing dozens of options across d
This category covers handheld and Bluetooth OBD2 scanners that plug into your car’s diagnostic port to read and clear fault codes, display live sensor data, and help you identify what’s triggering a check engine light before you visit a mechanic.

If your check engine light just came on or you want to stop paying $150 every time a shop plugs in a reader, a capable diagnostic scanner pays for itself fast. After testing dozens of options across d

If you've ever stared at a check engine light and wondered whether your scan tool can actually tell the system what to do - not just read codes - you already understand why bidirectional scanners are

If your check engine light just came on or you want to stop paying $100+ at the shop just to pull a diagnostic code, a quality OBD2 scanner pays for itself fast. We tested and ranked the best code rea

If your check engine light just turned on, you have two options: pay a shop $100+ just to read the code, or spend a fraction of that on an OBD2 scanner and do it yourself in under a minute. After test