U0138moderate severityNetwork
Lost Communication with All Terrain Control Module
on 2010 Audi A3 2.0L TDI I4 · FWD
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
00003
Control Module - Defective
01304
Radio - No Communication
01312
Powertrain Data Bus - Defective
01314
Engine Control Module (ECM) - no communications
01315
Transmission Control Module (TCM) - No Communication
01316
ABS Control Module - No Communication
01317
Instrument Cluster Control Module (J285) - No Communication
01318
Immobilizer Control Module - No Communication
01321
Airbag Control Module - No Communication
U0001
High Speed CAN Communication Bus