P1519moderate severityPowertrain
Idle Control Valve Position Circuit
on 2002 BMW M3 3.2L I6 S54 ยท RWD
What this code means
The DME detected a malfunction in the idle control valve (ICV) position circuit. The ICV regulates airflow at idle to maintain a stable engine speed. On BMW engines, this is commonly caused by a sticking or carbon-fouled valve.
Symptoms
- Rough or unstable idle
- Engine stalling at idle
- Idle speed too high or too low
- Check Engine Light
Common causes
- Carbon-fouled idle control valve
- Faulty idle control valve motor
- Wiring issue to ICV
- Vacuum leak affecting idle
- DME output driver failure
Diagnostic steps
- Test ICV operation by commanding open/close with scan tool
- Measure ICV motor resistance
- Clean ICV with throttle body cleaner
- Check vacuum lines around throttle body
- Inspect ICV wiring
Repair notes
Clean the idle control valve with throttle body cleaner; replace if cleaning does not resolve the issue.
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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