P0506moderate severityPowertrain
Idle Air Control System RPM Lower Than Expected
on 2007 Mini Cooper 1.6L I4 · FWD
What this code means
The idle speed is consistently below the target RPM.
Symptoms
- Low idle speed
- Stalling
- Rough idle
Common causes
- Carbon buildup in throttle body
- Vacuum leak
- Faulty IAC valve
- Low fuel pressure
- EGR valve stuck open
Diagnostic steps
- Clean throttle body
- Check for vacuum leaks
- Test IAC valve
- Test fuel pressure
- Check EGR valve
Repair notes
Clean throttle body and IAC. Check for vacuum leaks.
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Other Powertrain codes on this vehicle
29CC
Misfire Cylinder 1
29CD
Misfire Cylinder 2
29CE
Misfire Cylinder 3
29CF
Misfire Cylinder 4
29D0
Misfire Cylinder 5
29D1
Misfire Cylinder 6
29D2
Misfire Cylinder 7
29E0
Lambda Additive/Idle Adaptation Limit, Bank 1
29E1
Lambda Additive/Idle Adaptation Limit, Bank 2
29E2
Lambda Multiplicative Part-Load Adaptation Limit, Bank 1