DTC P0506 Or DTC P0507: Condition
WARNING: This page is about a different car, the 2002 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0506 is set when idle speed is 100 RPM or more lower than target idle speed. DTC P0507 is set when idle speed is 200 RPM or more than target idle speed. ECM continuously monitors this circuit. MIL is illuminated when Engine Control Module (ECM) detects malfunction during 2 consecutive drive cycles. Possible causes are:
- IAC valve malfunction.
- Short or open circuit between main relay, IAC valve and ECM.
- ECM malfunction.
- Idle air passage plugged.
- Vacuum leaks.
- EVAP canister purge control system malfunction.