P3622moderate severityPowertrain
Cylinder Deactivation Solenoid Circuit Open - Cylinder Specified
on 2008 Audi R8 4.2L V8 · AWD
What this code means
A specific cylinder deactivation solenoid circuit has an open condition. The PCM cannot command the lifter oil flow for the affected cylinder.
Symptoms
- Check Engine Light
- That cylinder always fires or never fires
- Engine vibration
- Misfire-like symptoms
- Fuel economy reduced
- Deactivation system may be fully disabled
Common causes
- Solenoid coil open
- Wiring harness open circuit
- Connector pin backed out
- PCM driver circuit failure
- Solenoid internal failure
Diagnostic steps
- Identify which cylinder solenoid is affected
- Test solenoid resistance
- Check wiring continuity to solenoid
- Inspect connector pins
- Test PCM driver output
Repair notes
Replace failed cylinder deactivation solenoid. Inspect VLOM for related damage.
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