Code 1 2 2 1 2 1

CODE 12 Problem with battery connection. Direct battery input to pcm disconnected within the last 50 ignition key-on cycles.

CODE 21** Problem with oxygen sensor signal circuit. Sensor voltage to computer not fluctuating.

The 12 is not problem, just advise that your battery has recently disconnected; the repeat 21, maybe can be for two O2 sensor, review it.

Hope helped (remember rated this help) Good lick.