Error code
OBD2 P0507
OBD2P0507
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Idle Air Control System RPM Higher Than Expected.
Severity
moderateCan drive, but may experience erratic idle and hard starting.
Summary
P0507 indicates that the idle air control system is allowing too much air into the engine, causing the RPM to be higher than expected during idle.
Symptoms
- Engine idling at an unusually high speed
- Erratic idle speeds fluctuating between high and low
Common Causes
- Stuck or dirty IAC valve
- Carbon buildup obstructing throttle valve movement
- Vacuum leaks in the intake system
Diagnosis
- Inspect and clean the throttle valve for carbon buildup.
- Check IAC valve connection and operation; test with carb cleaner if necessary.
- Look for vacuum leaks in intake system hoses and gaskets.
Fixes
- Clean or replace the IAC valve
FAQ
What should I do if my car has P0507?
Start by cleaning the throttle body and checking for vacuum leaks. If issues persist, consider replacing the IAC valve.
Can a dirty throttle cause this code?
Yes, carbon buildup on the throttle can obstruct its movement, leading to high idle speeds.
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
- P0508Idle Air Control System Circuit Low
- P0509Idle Air Control System Circuit High
- P0510Closed Throttle Position Switch
- P0511Idle Air Control Circuit
- P0512Starter Request Circuit