to start, anytime you bring your vehicle to the Ford dealer, you pay the $90 diagnostic fee just to find out what the problem is ,but for that $90 you DO find out exactly what the fault is and what is nessecary to repair it. Unlike some small shops, the dealer has the right tools and knowledge about that specific product and can tell you exactly what needs to be replaced to correct the concern on the first try instead of replacing a bunch of parts. I would suggest taking it to the dealer to have it appropriately diagnosed. My personal opinion, though not concrete since i cannot test the vehicle, is that the for the 1236 code it might be a cracked left rear axle tone ring, this is very common for these models , though could have cracked from the stress of the impact, the c2769 code is the bad longitudinal acceleration sensor ( Ford's term Sensor Cluster), likely damaged during the impact as this sensor contains G-force and motion sensors, or it could be a bad ABS module as well though if it is not sending the sensor cluster the proper information. Code c1676 refers to 'battery pack voltage out of range', which could possibly be a bad ABS module as well. Since the C1676 code is the lowest number code(besides the 1236 but that is an obvious cracked tonering) it is the first code to diagnose and could resolve the 2769 code. See the pinpoint test below to diagnose the concern or have the dealer perform the test
NOTICE: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.