U0101high severityNetwork
Lost Communication with TCM
on 2015 Kia Forte 1.8L I4 · FWD
What this code means
Cannot communicate with the Transmission Control Module.
Symptoms
- Check Engine Light
- Transmission in limp mode
- Harsh shifting or no shifting
- Trans warning light
Common causes
- TCM power/ground failure
- CAN bus wiring to TCM
- TCM failure
- Fuse blown
Diagnostic steps
- Check TCM fuses
- Test power and ground at TCM
- Check CAN bus wiring
- Try direct communication with TCM
Repair notes
Check fuses and power supply. Verify CAN bus.
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus