U0138moderate severityNetwork
Lost Communication with All Terrain Control Module
on 2009 Honda Pilot 3.5L V6 · AWD
What this code means
Cannot communicate with the off-road or terrain management control module.
Symptoms
- Off-road mode not available
- Terrain select not working
- 4WD features limited
- Terrain response warning
Common causes
- Terrain module failure
- CAN bus wiring
- Module power loss
- Fuse blown
Diagnostic steps
- Check terrain module fuse
- Test power and ground
- Check CAN wiring
- Test terrain mode switch
- Scan for terrain module DTCs
Repair notes
Check fuses and mode selector switch. Module may be integrated with transfer case controller.
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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