Service data and specifications
(SDS)
Periodical Maintenance Specification
ENGINE OIL CAPACITY (APPROXIMATE)
  ...
P074C Unable to engage 4GR
Description
This malfunction is detected when the A/T does not shift into 4GR position as
instructed by TCM. This is not
only caused by electrical malfunction (circuits open or shorted) but by
mechanical malfunction such as control
valve sticking, improper solenoid valve operation, etc.
DTC ...