Best Automotive Diagnostic Scanners for DIY Code Reading and Service Resets
Compare 10 automotive diagnostic scanners, from basic OBD2 code readers to full-system tools with service resets, live data, battery testing, and bidirectional controls.
OBD2 Scanners & Diagnostics
Learn what a diagnostic scanner can read, how to interpret vehicle data and where a code reader reaches its limits. Use the explainers and diagnostic guides before comparing tools for a specific vehicle.
Best Automotive Diagnostic Scanner: Picks for DIY Repairs
Compare nine automotive diagnostic scanners by price, system coverage, live data, reset functions, compatibility limits, and bidirectional capability, from basic OBD2 readers to professional scan tools.
Best Automotive Diagnostic Computer: 9 Scanners Matched to the Job
Compare nine automotive diagnostic computers by system coverage, OBD2 functions, compatibility, price, and service-reset capability, from basic code readers to advanced scan tools.
Best Automotive Diagnostic Code Reader for DIY Diagnosis
Compare 10 automotive diagnostic code readers by price, vehicle coverage, power requirements, live data, code databases, and ABS or SRS support.
Best Auto Scan Tool for DIY Diagnostics: 9 Picks Compared
Compare nine AUTO scan tools from $15.97 to $619, including basic OBD2 readers, multi-system scanners, reset tools, and bidirectional diagnostic platforms.
Best OBD2 Scanner for iPhone: 7 Bluetooth Picks From Budget to Pro
A buying guide to the best OBD2 scanners that work with iPhone, comparing seven Bluetooth-capable picks on diagnostic depth, app ecosystem, vehicle coverage, and price.
Best AUTO Code Reader Scanner for Check-Engine and System Diagnostics
Compare 10 OBD2 scanners by vehicle coverage, diagnostic functions, power source, and limitations. Find the right reader for engine, ABS, SRS, transmission, and emissions checks.
Best OBD2 Gauge: Matching the Right Digital Display to Your Car
Nine OBD2 gauge displays compared on documented compatibility, data depth, alarms, and price, with distinct picks for mixed fleets, budget buyers, and turbo monitoring.
Best AUTO Code Reader Reviews: 10 Picks for DIY Diagnostics
Compare 10 auto code readers by compatibility, connection type, diagnostic coverage, battery testing, emissions functions, active tests, and price, from $3.99 to $375.99.
Best AUTO Code Reader for Check-Engine Diagnostics
Compare 10 manufacturer-listed AUTO code readers for check-engine diagnostics, live data, battery testing, emissions checks, and ABS/SRS coverage.