Engine and gearbox (P)
P0507: Idle control system high RPM
The engine's idle speed is higher than expected, indicating a problem with the idle control system.
Checked by a licensed car technician · last reviewed 29 September 2026
Symptoms
- High idle speed
- Engine runs rough at idle
- Increased fuel consumption
- Check engine light on
Common causes
- Dirty throttle body
- Vacuum leak
- Faulty idle air control valve
- Faulty throttle position sensor
- Wiring issues
How to check it yourself
- Inspect and clean the throttle body
- Check for vacuum leaks
- Test the idle air control valve
- Inspect the throttle position sensor
- Examine wiring and connectors
Can I keep driving?
The car can be driven, but high idle may affect fuel economy and drivability.
General guidance, not a professional inspection. Confirm faults with measurements before buying parts, and use a qualified mechanic for brakes, steering, fuel leaks, airbags, and other safety-critical work. Terms and disclaimer