Probable Causes

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

When the DTC P0720: Output shaft speed sensor system circuit is stored
Damaged harness or connector
When the DTC P0846: 2-6 brake pressure switch system is stored
When the DTC P0876: High clutch pressure switch system is stored
When the DTC P0962, P0963: Line pressure linear solenoid valve system is stored
When the DTC P0973, P0974: Low clutch linear solenoid valve system is stored
When the DTC P0976, P0977: 2-6 brake linear solenoid valve system is stored
When the DTC P0979, P0980: 3-5 reverse clutch linear solenoid valve system is stored
When the DTC P0982, P0983: high clutch linear solenoid valve system is stored
When the DTC P0988: Low-reverse brake pressure switch is stored
When the DTC P0998, P0999: low clutch shift solenoid valve system is stored
When the DTC P099B, P099C: Low-reverse brake shift solenoid valve system is stored
When the DTC P2763, P2764: Lock-up and Low-reverse brake linear solenoid valve system is stored