U0103high severityNetwork
Lost Communication with Gear Shift Control Module
on 2008 Audi R8 4.2L V8 · AWD
What this code means
Cannot communicate with the gear shift module that manages electronic shifter input.
Symptoms
- Shifter inoperative
- Transmission stuck in park
- Shift indicator not matching
- Cannot select gears
Common causes
- Shift module power failure
- CAN bus wiring issue
- Shift module failure
- Shifter cable disconnected
- Fuse blown
Diagnostic steps
- Check shift module fuse
- Test module power and ground
- Inspect CAN wiring
- Check shifter mechanism
- Test shift position switches
Repair notes
Check shift module power supply. Verify shifter mechanism is functional.
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00003
Control Module - Defective
01304
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01312
Powertrain Data Bus - Defective
01314
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01316
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U0001
High Speed CAN Communication Bus