U0038low severityNetwork
LIN Bus A (+) Open
on 2009 Audi R8 5.2L V10 (Gen 1, 525hp) · AWD
What this code means
The LIN bus A wire is open, preventing communication with LIN slave devices.
Symptoms
- LIN-connected devices inoperative
- Seat memory not working
- Rain sensor offline
- Interior lighting module offline
Common causes
- Broken LIN bus wire
- Corroded LIN connector
- LIN module unplugged
- Wiring harness damage
Diagnostic steps
- Check LIN bus wire continuity
- Inspect connectors
- Test for 12V pullup on LIN bus
- Check LIN master output
Repair notes
Repair open LIN bus wire. Check connectors at all LIN slave devices.
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