P0505

DTC P0505
Blocked Idle Air Control Valve Drive cycle A:Signal out of range - above maximum.

DTC P0505
Blocked Idle Air Control Valve Drive cycle A:Signal out of range - below minimum.

Possible causes by suggested order of priority:
- IACV Jammed.
- IACV blocked.
- IACV Incorrectly fitted.

IACV Jammed.
CHECK THE FOLLOWING:
- Idle Air Control Valve mechanically jammed.
POSSIBLE FAULTS:
- Idle Air Control Valve Faulty.

IACV blocked.
CHECK THE FOLLOWING:
- Idle Air Control Valve or pipework blocked.
POSSIBLE FAULTS:
- Idle Air Control Valve Faulty.
- Pipework or valve blockage

IACV Incorrectly fitted.
CHECK THE FOLLOWING:
- Idle Air Control Valve fitted incorrectly (large air leak).
POSSIBLE FAULTS:
- Idle Air Control Valve very loose.
- Large air leak near idle air control valve.