The code 7e8 on a 2013 Altima 6 Cylinder indicates a problem with the vehicle’s transmission control module (TCM). The TCM is responsible for controlling the transmission’s operation, including gear shifting and torque converter lockup. When the TCM detects a problem, it will store a code in the vehicle’s computer. The code 7e8 indicates that the TCM has detected a problem with the transmission’s shift solenoids. The shift solenoids are responsible for controlling the flow of transmission fluid to the transmission’s clutches and bands. When the shift solenoids are not working properly, the transmission may not be able to shift gears correctly or may experience other problems.
There are several potential causes of the code 7e8 on a 2013 Altima 6 Cylinder. One possibility is that the shift solenoids are faulty. Another possibility is that there is a problem with the wiring or connectors to the shift solenoids. Finally, it is also possible that the TCM itself is faulty.