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2014 MAZDA 3 codes P0763 , P0768 and P0773

The P0700 codes point to the solenoids D, E, C but can also be caused by dirty transmission fluid and a clogged transmission filter. The best step is to change the fluid, filter, and transmission cooler fluid since it will be the least intrusive. If that doesn't work and you get the same codes, then we recommend replacing the solenoids.