P0956moderate severityPowertrain
Auto Shift Manual Mode Circuit Range/Performance
on 2002 Audi A6 3.0L V6 · AWD
What this code means
The automatic shift manual mode circuit is operating outside its expected range or performing poorly. Signal values do not match commanded shift requests.
Symptoms
- Inconsistent manual mode operation
- Delayed shift response
- Transmission warning light on
Common causes
- Faulty mode selector switch
- Damaged wiring or connectors
- Failed transmission control module
- Corroded ground connection
Diagnostic steps
- Scan for related codes
- Compare commanded vs actual signals in live data
- Inspect wiring and connectors
- Test selector switch operation
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