Error code
OBD2 P0519
OBD2P0519
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Idle Air Control System Performance.
Severity
moderateCan drive, but performance may be affected and fuel efficiency could decrease.
Summary
P0519 indicates an issue with the idle air control (IAC) system, which regulates engine idling speed. The problem is related to the IAC circuit.
Common Causes
- Poor wiring or connection
- Faulty IAC valve
- ECM issues
Fixes
FAQ
What does P0519 mean?
P0519 indicates a problem with the idle air control system, which can affect engine idling performance.
How do I fix P0519?
Common fixes include checking and repairing wiring or connections, replacing the IAC valve if faulty, or addressing ECM issues. Professional diagnosis is recommended to identify the exact cause.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0500Vehicle Speed Sensor 'A'
- P0501Vehicle Speed Sensor 'A' Range/Performance
- P0502Vehicle Speed Sensor 'A' Circuit Low Input
- P0503Vehicle Speed Sensor 'A' Intermittent/Erratic/High
- P0504Brake Switch 'A'/'B' Correlation
- P0505Idle Air Control System
- P0506Idle Air Control System RPM Lower Than Expected
- P0507Idle Air Control System RPM Higher Than Expected
- P0508Idle Air Control System Circuit Low
- P0509Idle Air Control System Circuit High
- P0510Closed Throttle Position Switch
- P0511Idle Air Control Circuit