DTC Advanced Diagnostics: P1A4E: General Description

When the transmission control module (TCM) shifting control malfunctions, it may cause unintended vehicle action contrary to the selected shift position/mode. Unintended vehicle action contrary to the selected shift position/mode may occur by a cause of abnormal engagement combinations of the clutch and the brake or abnormal switching of the parking actuator valve and the two-way clutch. The TCM monitors the conditions of the clutch, the brake, the parking actuator valve, and the two-way clutch to secure safety before the vehicle leads to unintended vehicle action to the selected shift position/mode. The TCM presumes that there is abnormal engagement of the clutch and the brake to the selected shift position/mode or abnormal switching of the parking actuator valve and the two-way clutch to the selected shift position/mode from the values of the transmission fluid pressure sensor, the parking actuator valve stroke sensor, and the two-way clutch actuator valve stroke sensor. If the TCM determines a shifting control malfunction, a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type