P0507Idle Control System RPM - Higher Than Expected
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- CARB requires the idle speed control to be monitored: petrol engines must flag a fault if the target idle speed is not reached within +200/−100 rpm, diesels within ±30 %. Older engines use a separate idle air control valve that bypasses the closed throttle; with electronic throttle the throttle itself controls idle and no separate valve exists. P0507 means the idle speed stays above target although the control is at its minimum – air bypasses the control or the throttle does not close. GM uses more than 182 rpm filtered (MIL after two trips), Ford petrol +200 rpm, Ford diesel +160 rpm, Subaru +200 rpm for 10 s three times; on the Saab 9-4X three overspeed fuel cut-offs at standstill also set it. False air is the classic cause.
- What you may notice
- Idle speed too high
- Automatic car creeps at standstill
- Hissing from false air
- Likely causes
- LikelyFalse air (vacuum hose, intake gasket, brake booster)
- PossibleCrankcase ventilation leaking or wrongly routed
- PossibleThrottle not closing fully (deposits, ice, stop misadjusted)
- PossibleIdle valve stuck open
- RareWrong throttle learned value after cleaning or replacement
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.