P2004moderate severityPowertrain
Intake Manifold Runner Control Stuck Open Bank 1
on 2008-2015 Audi R8 4.2L V8 · AWD
What this code means
The variable intake manifold runner flaps on bank 1 are stuck in the open position.
Symptoms
- Reduced low-RPM torque
- Check engine light
- Rough idle
- Poor fuel economy
Common causes
- Broken runner flap linkage
- Failed actuator motor
- Carbon buildup on flaps
- Vacuum leak
Diagnostic steps
- Inspect intake manifold runner mechanism
- Test actuator motor
- Check vacuum lines if applicable
Repair notes
Clean carbon deposits from runner flaps. Replace actuator motor or linkage as needed.
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