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Hello, Eddie here and I will do all I can to help. Do you have the scanner now with you? If so, did you clear these codes out after reading them? or are they both still stored? The P1670 refers to a problem with the immobilizer system which shuts the vehicle down in the event of a theft. The first code refers to a mass air flow sensor fault. These two are totally separate from each other, but could cause similar symptoms of it shutting down immediately after initial start up. If you can erase those codes I would do so now. And see what comes back immediately after attempting to run it. Is it broke now or does it run fine now?