Code result
P0519
Idle Air Control System Performance
Moderate severity
What it means
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.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
IAC valve sticking due to carbon
highOne of the most commonly reported causes for this code — check this first.
Intake leak disturbs idle metering
mediumA plausible cause — test and verify before replacing parts.
Related help
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