U0005high severityNetwork
High Speed CAN Communication Bus (+) High
on 2015 Audi SQ5 3.0L Supercharged V6 · AWD
What this code means
The CAN High wire voltage is higher than expected, indicating a short to battery voltage.
Symptoms
- CAN bus communication failure
- Multiple module faults
- Warning lights on
Common causes
- CAN H wire shorted to battery power
- Wiring harness damage
- Module internal fault driving CAN H high
Diagnostic steps
- Measure CAN H voltage (should not exceed 4V)
- Inspect wiring for shorts to power wires
- Disconnect modules to isolate fault
- Check for wiring harness rub-through
Repair notes
Repair the short to power on CAN H. Often caused by wiring harness rubbing against sharp edge.
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00003
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01316
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U0001
High Speed CAN Communication Bus