U0195high severityNetwork
Lost Communication with 4WD Control Module
on 2019 Audi A6 3.0L V6 TFSI · AWD
What this code means
Cannot communicate with the four-wheel drive engagement control module.
Symptoms
- 4WD indicator flashing
- Cannot engage or disengage 4WD
- Service 4WD light
- Drivetrain warning message
Common causes
- 4WD module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Transfer case actuator issue
Diagnostic steps
- Check 4WD module fuse
- Test power and ground
- Check CAN wiring
- Test transfer case actuator motor
- Inspect 4WD switch
Repair notes
Check fuses and transfer case actuator. Module may need reprogramming after replacement.
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00003
Control Module - Defective
01304
Radio - No Communication
01312
Powertrain Data Bus - Defective
01314
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01316
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U0001
High Speed CAN Communication Bus