AutoCodes – Hyundai – P1507 Hyundai

P1507 Hyundai Code - Idle Speed Control Actuator Signal Low

Quick Answer

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. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1507 Hyundai indicates Idle Speed Control Actuator Signal Low.
Common causes: Common causes include 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.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 35,881

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1507 Hyundai 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 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.

OBDII Code P1507 Hyundai - Idle Speed Control Actuator Signal Low - AutoCodes.com — P1507 Hyundai Code - Idle Speed Control Actuator Signal Low

What does this mean?

What are the Possible Causes of the DTC P1507 Hyundai?

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

How to Fix the DTC P1507 Hyundai?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1507 Hyundai code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1507 Hyundai Code

1. What are the common symptoms of OBDII code P1507 in a Hyundai related to the Idle Speed Control Actuator Signal Low?

- Common symptoms include rough idling, stalling at idle, and potential issues with acceleration.

2. What are the possible causes of OBDII code P1507 in a Hyundai?

- Possible causes for this code include a faulty idle speed control actuator, wiring issues, vacuum leaks, or a malfunctioning PCM.

3. How can I diagnose the cause of OBDII code P1507 in my Hyundai?

- To diagnose this code, you may need to perform a visual inspection of the idle speed control actuator and its wiring, check for vacuum leaks, and use a diagnostic scanner to monitor sensor data.

4. Can a dirty throttle body cause OBDII code P1507 in a Hyundai?

- Yes, a dirty throttle body can disrupt the idle speed control system and potentially trigger code P1507. Cleaning the throttle body may help resolve the issue.

5. Is it safe to continue driving my Hyundai with OBDII code P1507 present?

- It is not recommended to drive your Hyundai with this code active, as it can lead to poor engine performance, stalling, and other potential safety hazards.

6. How can I repair OBDII code P1507 related to the Idle Speed Control Actuator Signal Low in my Hyundai?

- Repair options may include replacing the idle speed control actuator, repairing or replacing damaged wiring, fixing vacuum leaks, or reprogramming the PCM if necessary.

7. Can a low battery voltage trigger OBDII code P1507 in a Hyundai?

- Yes, low battery voltage can affect the operation of various engine components, including the idle speed control actuator, and may contribute to code P1507 being set.

8. Will resetting the OBDII code P1507 in my Hyundai make it go away permanently?

- Resetting the code may temporarily clear it, but if the underlying issue is not addressed, the code is likely to return. It's important to diagnose and repair the root cause.

9. Are there any software updates available from Hyundai to address OBDII code P1507 issues?

- It's recommended to check with a Hyundai dealership or authorized service center to inquire about any available software updates that may address idle speed control actuator signal low problems.

10. Can a professional mechanic help diagnose and repair OBDII code P1507 in my Hyundai?

- Yes, a professional mechanic with experience in diagnosing and repairing Hyundai vehicles should be able to effectively address OBDII code P1507 and related issues.