A basic OBD2 scanner may read emissions codes and readiness. ABS, SRS, transmission and EV access require confirmed coverage for the exact vehicle.
This reference supports the stated topic only. Model, model year, equipment, current rule or individual vehicle conditions may differ; check the original source before acting.
Read the California Bureau of Automotive Repair original: OBD test reference Source date: document date not recorded; research checked: 2026-11-01.
Match capability to the job
For a check-engine light, save all available codes, statuses and freeze frame. For ABS, SRS, TCM or EV faults, verify the tool maker’s supported make, model year, module and software version.
Buying criteria
- Supported vehicle and module list
- Stored, pending and permanent code access
- Freeze-frame export
- Update and subscription terms
- Return policy if coverage is uncertain
Choose the smallest capability that solves the question
If your goal is to save a check-engine code and readiness status, a documented generic emissions reader may be enough. If you need to understand an ABS, airbag, transmission or EV warning, read the tool maker's coverage list for that exact module. Do not pay for coding or actuator controls merely because the tool has a long feature list.
Look for code status, freeze-frame export and a way to save results before clearing. If the scan shows P0700, you may need a TCM-capable tool to retrieve the transmission module's own codes; P0700 alone is only a request for a malfunction indication.
No ranking without a fit test
CarCodes has not tested a specific scanner, compared update policies or verified exact vehicle support. A price or best-product badge would imply evidence that this research set does not contain. Use the capability checker and the maker's current coverage documentation instead.
Sources and scope
- California Bureau of Automotive Repair — OBD test reference Document: date not recorded · Research checked: 2026-11-01
- OBDLink — Enhanced diagnostics and add-ons Document: date not recorded · Research checked: 2026-11-01
Research snapshot: 2026-11-01. Source documents may have newer revisions. Verify current instructions and VIN eligibility with the manufacturer.