U0304moderate severityNetwork
Software Incompatibility with Cruise Control Module
on 2002 Audi A6 3.0L V6 ยท AWD
What this code means
Software incompatibility with the cruise control system causing data errors.
Symptoms
- Cruise control erratic
- Adaptive cruise not engaging
- Speed set point drifting
- Cruise control disabling unexpectedly
Common causes
- Cruise module software outdated
- Software conflict after update
- Module version mismatch
Diagnostic steps
- Check cruise control module software version
- Update module software
- Check for known software conflicts
- Verify module compatibility
Repair notes
Update cruise control module software to version compatible with other vehicle modules.
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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