TCM check the Battery voltage in order to normal operation of each solenoid valves and sensors.Normal Battery voltage is essential for control in A/T system.
TCM set this code If Battery voltage lower than 9volt.
Item
Detecting Condition
Possible Cause
DTC Strategy
Check voltage range
Power supply wiring
Battery
Alternator
TCM
Enable Conditions
IG "ON"
Engine rpm > 400rpm or
Input speed > 400rpm
CAN communication : normal
Threshold Value
Battery voltage > 9V
Diagnostic Time
More than 20seconds
Fail Safe
Fixed at 4th gear.