U0002moderate severityNetwork
High Speed CAN Communication Bus Performance
on 2010 Audi Q7 3.0L TDI V6 · AWD
What this code means
The high-speed CAN bus is operational but data integrity or timing is degraded. Bus communication is intermittent or corrupted.
Symptoms
- Intermittent warning lights
- Sporadic communication errors
- Occasional system dropouts
- Scan tool intermittent connection
Common causes
- Partially damaged CAN wiring
- Corroded CAN bus connector
- Weak termination resistor
- Electromagnetic interference
- Module with degraded CAN transceiver
Diagnostic steps
- Scope CAN H and CAN L for signal quality
- Check CAN bus termination resistance
- Inspect wiring for partial damage
- Check for aftermarket devices on bus
- Isolate modules to find degraded transceiver
Repair notes
Intermittent CAN issues often caused by corroded connectors or partially damaged wiring. Check all CAN bus splices.
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00003
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01316
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U0001
High Speed CAN Communication Bus