Check engine' light?. No problem. Also allows unlocking of hidden features. IOS devices connect via the app and not directly from the phone! After
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Carista OBD2 Diagnostic Scanner – Android and iOS
Using CARISTA to enable the 4Runner's Hidden Features & Review
Carista OBD2 adapter bluetooth
Shop Carista OBD2 Bluetooth Adapter & App for VW, Audi, Nissan, Infiniti, Toyota, Lexus, BMW, and Mini. Diagnose, customize, and service your car.
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Carista-OBD2-Car-Diagnostics-Scanner-02 - SA Tuning Remap, Chip Tuning, Engine Tuning, DPF removal
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Carista OBD2 8.3.1 Free Download
Carista OBD2 - Apps on Google Play
COBD-BT24 - Carista Bluetooth OBD2 Adapter - BMW & Mini
Carista OBD Adapter for iPhone/iPad and Android : : Car & Motorbike