U1000moderate severityNetwork
CAN Communication Bus Fault
on 2007 Audi Q7 4.2L V8 · AWD
What this code means
General manufacturer-level CAN bus communication fault detected. Multiple modules may report this code simultaneously.
Symptoms
- Warning lights on
- Multiple communication DTCs
- Intermittent electrical features
- Scan tool intermittent connection
Common causes
- CAN bus wiring damage
- Module failure corrupting bus
- Poor ground connection
- Aftermarket device on CAN bus
- Termination resistor fault
Diagnostic steps
- Check CAN bus resistance (should be ~60 ohms)
- Scope CAN bus signals
- Remove aftermarket devices
- Check all CAN bus connectors
- Isolate modules to find fault source
Repair notes
Systematic CAN bus diagnosis required. Start with bus resistance measurement and visual inspection.
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Bluetooth code reader (~$25)
Veepeak OBDCheck BLE →
Pairs with your phone — reads and clears codes, live data.
Serious DIY (~$100)
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
Shop-grade tablet (~$300+)
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
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