Powertrain
generic / SAE
P0519
Idle Air Control System Performance
The idle air control system is electrically intact, but the actual idle airflow does not match the commanded value - typical for a sticky valve, intake leak, or carbon build-up around the throttle bore.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / 19
Possible causes
- IAC valve sticking due to carbon high
- Intake leak disturbs idle metering medium
Symptoms
- Check engine light on
- Idle speed too high, too low, or unstable
- Possible stalling at idle or after cold start
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 80–320 €
- Estimated time: 0.5–1.8 h
- Component: idle air control valve
- Component: intake manifold
- Component: throttle body
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012