P0507 Idle Air Control System RPM Higher Than Expected
What does P0507 mean?
P0507 — Idle Air Control System RPM Higher Than Expected. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects idle air control system rpm higher than expected. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0507
- Vacuum leak in the intake system
- Sticking or carboned-up idle air control valve
- Faulty throttle position sensor
- Stuck-open EGR valve
- Incorrect base idle set or throttle cable binding
How to fix P0507
- Smoke test the intake system for vacuum leaks
- Clean the IAC valve and throttle body
- Watch commanded idle vs actual RPM on an OBD-II scanner
- Check EGR valve for sticking open
- Verify throttle cable free travel and base idle adjustment