I have 2008 Maxima 3.5. Won't go past 40mph replaced coils all 6, maf, o2, crank

Hello, P0725 speaks to engine speed (measured via the crankshaft sensor); P1722 is concerned with vehicle speed, as measured by a wheel speed sensor. P0746 refers to a transmission sensor - not to condemn the sensor, but to indicate that low line pressure was detected. P0826 concerns a manual mode fault with the transmission. P1701 concerns low battery voltage powering the transmission control module. P0550 relates to a power steering pressure sensor issue. P2A03 doesn't show up for me. Bottom line - have you first checked for proper battery and charging system voltage? If you have low reference voltage while the vehicle runs, lots of crazy codes can occur, and the vehicle will not run as designed. If you can rule the battery and charging system out, then I would clear codes and see what returns on a road test. Concentrate on ones that return quickly. Some of these codes (if not voltage related!) could be erroneous or due to other related system issues. Codes don't tell all the answers, but instead give clues. If you follow the wrong code, you can go down the wrong path and reach a dead end quickly. Safe to say: get some local help from a skilled tech! Good luck.