Automatic Transmission

Troubleshooting

~1min read

Troubleshooting

Limp Home Mode

Features a fail-safe function that prevents hazardous situations in the event of a transaxle malfunction. The vehicle will operate in limp-home mode if a transaxle malfunction occurs. In this mode, the transaxle operates at a minimum functional level (fixed gear, limited shifting, reverse, neutral), allowing the vehicle to reach a service center.Troubleshooting
Symptom of Malfunction Suspected Area Remedy
Shift Delay, Shift Shock, Poor Acceleration Clutch/brake damaged Replace the brake or clutch.
Faulty hydraulic control Inspect the solenoid valve.
Faulty hydraulic supply Check the fluid level.
Check fluid cleanliness.
Replace the oil pump.
TCM learning not performed Perform TCM adaptive learning values.
Mechanical Fail-Safe Mode
(locked in 4th gear, manual shifting disabled)
Faulty solenoid valve Inspect the solenoid valve.
Replace the valve body.
Faulty TCM Replace the TCM.
Faulty CAN communication Inspect the CAN communication line.
Limp Home Mode
(locked in 4th gear, manual shift 2nd to 4th enabled)
Faulty input and output speed sensor Replace the input and output speed sensors.
Limp Home Mode
(1st to 2nd shift disabled, 3rd to 6th shift enabled)
Faulty lock switch Replace the inhibitor switch.
Manual shift disabled Faulty TCM Replace the TCM.
Faulty connector connection Check the connection of the manual mode connector.
Faulty manual mode switch Replace the manual mode switch housing.

Test yourself

A quick Kia Carens RP quiz: every answer comes with an explanation and a link to the manual page.