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P1505 - Idle Speed Control Actuator Signal Low

Possible causes
- Faulty Idle Speed Control Actuator (ISCA) valve
- Idle Speed Control Actuator (ISCA) valve harness is open or shorted
- Idle Speed Control Actuator (ISCA) valve circuit poor electrical connection
What does this mean? What does this mean?
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1505 Description

The Idle Speed Control Actuator (ISCA) valve is installed on the intake manifold and controls the intake airflow that is bypassed around the throttle plate to keep constant engine speed when the throttle valve is closed. The function of the ISCA valve is to maintain idle speed according to various engine loads and conditions, and also to provide additional air during starting. The ISCA valve consists of an opening coil, a closing coil, and a permanent magnet. Based on information from various sensors, the Engine Control Module (ECM) controls both coils by grounding their control circuits. According to the control signals from the ECM, the valve rotor rotates to control the by pass airflow into the engine.

P1505 Information for specific makes
P1505 ACURA Positive Crankcase Ventilation Air Leakage
P1505 AUDI Closed Throttle Position Does Not Close/Open Circuit
P1505 BMW Idle Speed Control Valve Closing Solenoid Control Circuit Electrial
P1505 CHRYSLER Vehicle Speed Output Circuit High
P1505 DODGE Vehicle Speed Output Circuit High
P1505 FORD Idle Air Control System at Adaptive Clip
P1505 HONDA Positive Crankcase Ventilation Air Leakage
P1505 HYUNDAI Idle Speed Control Actuator Signal Low
P1505 KIA Idle Speed Control Actuator Signal Low
P1505 LINCOLN Idle Air Control System at Adaptive Clip
P1505 MAZDA Idle Air Control At Adaptive Clip
P1505 MERCURY Idle Air Control System at Adaptive Clip
P1505 MINI Idle Speed Control Valve Closing Solenoid Control Circuit Electrial
P1505 SUBARU Idle Control System Circuit High Input
P1505 VOLKSWAGEN Closed Throttle Position Does Not Close/Open Circuit
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