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Well, the code 12 is telling you the battery or the computer has been disconnected in the last 50 starts, code 21 is a problem with the O2 sensor, and code 55 is telling you there are no more trouble codes stored in memory. Code 21 means the O2 sensor is not switching from rich to lean, which can be a faulty sensor or a fuel problem.
700=TRANSMISSION CONTROL SYSTEM, NEED TO READ TRANSMISSION DTC's ON THE DRBIII(R) 732= TRANSMISSION.....POSSIBLE CAUSES----RELATED DTC'S PRESENT, TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY, INTERNAL TRANSMISSION, INTERMITTENT GEAR RATIO ERRORS.. Hope this helps ??
Thats not a valid obdII code. Thats actually an error from the scanner itself not understanding the data that was sent.. I would clear the code and see if it returns. If it does find someone with the proper code scanner for a CAN system.
that is two codes, niether mean any problem, here are the difinitions, 12
Direct Battery input to PCM disconnected within last 50 ignition key-on cycles. Normal if battery has been disconnected, otherwise check battery power and ground connections
A DTC 55 is used to end all DTC messages. This code does not show on the DRB tool and indicates a completion of the stored codes on the Malfunction Indicator Lamp (check engine lamp).