P0789moderate severityPowertrain
Shift/Timing Solenoid Intermittent
on 2017 Audi S5 3.0L Supercharged V6 · AWD
What this code means
The shift or timing solenoid circuit is showing an intermittent fault. Problems come and go, often due to loose wiring or connectors.
Symptoms
- Intermittent harsh shifts
- Occasional check engine light
- Random shift delays
Common causes
- Loose or corroded connector
- Intermittent wiring fault
- Failing solenoid
- Valve body issues
Diagnostic steps
- Wiggle test wiring and connectors
- Check for stored and pending codes
- Monitor solenoid signal while driving
- Inspect valve body and fluid condition
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