Along with your phone or tablet, the Fixd onboard diagnostics (OBD) adapter is an inexpensive way to help you get a handle on what’s going on under the hood of your car and remind you of maintenance items. However, it stops short of being a one-stop diagnostic center.
Like other diagnostic scanners, the tiny Fixd adapter plugs into the OBD-II port of any car sold in the U.S. since 1996. This lets it tap into the vehicle’s computers and display active and archived faults.
Editors’ note: Avoid the first-generation Fixd adapter, which has not been well received among its buyers. The second-generation hardware — the one we tested — is much more reliable and useful.
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https://www.tomsguide.com/us/fixd-review-2nd-generation,review-4577.html