P0507moderate severityPowertrain
Idle Air Control System RPM Higher Than Expected
on 2000 BMW M5 4.9L V8 S62 · RWD
What this code means
The idle speed is consistently above the target RPM.
Symptoms
- High idle speed
- Engine racing at idle
Common causes
- Vacuum leak (most common)
- IAC valve stuck open
- Throttle plate not closing fully
- Intake gasket leak
Diagnostic steps
- Check for vacuum leaks
- Inspect throttle plate
- Test IAC valve
- Check intake gaskets
Repair notes
Find and fix vacuum leak. Clean throttle body. Replace IAC if stuck open.
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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