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Check that you typed it exactly as printed — the code is not case-sensitive, but a mistaken 0 for O will fail. Each code covers two devices; if you have already activated two, free one up under Settings on a device you no longer use. If it still will not take, email us the code and we will look it up.

Turn the ignition to on before pairing — the OBD-II port has no power in some vehicles until it is. Then confirm Bluetooth is on and that DriveDecode has Bluetooth permission. Pair through the app, not through your phone's Bluetooth settings; the adapter is a Low Energy device and will often not appear in the system pairing list.

That means the adapter is awake but the car is not answering. Almost always the ignition is off or only in accessory. Turn the key to on, or press start without your foot on the brake. If the car is running and it still fails, the port may not be powered — check the fuse for the cigarette lighter or accessory circuit, which often shares it.

Generic OBD-II only guarantees access to engine and emissions systems. ABS, airbag, TPMS and transmission-specific codes live on manufacturer-specific channels that need make-specific decoding, and no generic adapter can read them. We would rather say so plainly than sell you something that disappoints.

Clearing codes also resets your readiness monitors, and a test station will fail a car whose monitors have not run. They reset themselves over a mix of driving — typically 50 to 100 miles including highway and stop-and-go. Check the readiness screen in the app before you drive to the station.

No. The activation code in your adapter box covers the app on two devices. There is nothing recurring.