AutoCodes – Subaru – P1515 Subaru

P1515 Subaru Code - Idle Air Control Solenoid Valve Signal 3 Circuit High Input

Quick Answer

The Idle Air Control Solenoid valve is incorporated in the throttle body and regulates the amount of intake air which bypasses the throttle valve built into the throttle body. Common causes include Faulty Idle Air Control Solenoid Valve, Idle Air Control Solenoid Valve harness is open or shorted, Idle Air Control Solenoid 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
P1515 Subaru indicates Idle Air Control Solenoid Valve Signal 3 Circuit High Input.
Common causes
Common causes include Faulty Idle Air Control Solenoid Valve, Idle Air Control Solenoid Valve harness is open or shorted, Idle Air Control Solenoid 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 5,767
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 26, 2019
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Code P1515 Subaru Description

The Idle Air Control Solenoid valve is incorporated in the throttle body and regulates the amount of intake air which bypasses the throttle valve built into the throttle body. It is activated by a signal sent from the Engine Control Module (ECM) to maintain engine idle speed to the target engine speed.
OBDII Code P1515 Subaru - Idle Air Control Solenoid Valve Signal 3 Circuit High Input - AutoCodes.com
P1515 Subaru Code - Idle Air Control Solenoid Valve Signal 3 Circuit High Input

What are the Possible Causes of the DTC P1515 Subaru?

  • Faulty Idle Air Control Solenoid Valve
  • Idle Air Control Solenoid Valve harness is open or shorted
  • Idle Air Control Solenoid Valve circuit poor electrical connection

How to Fix the DTC P1515 Subaru?

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 P1515 Subaru 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.

Need more information about the P1515 Subaru code?

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Need Help with the Code?

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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 P1515 Subaru Code

1. What are the common symptoms of OBDII code P1515 in a Subaru related to the Idle Air Control Solenoid Valve Signal 3 Circuit High Input?

- Common symptoms include rough idling, stalling at idle, fluctuating idle speed, and potential engine hesitation.

2. What are the possible causes of OBDII code P1515 in a Subaru?

- Possible causes include a faulty idle air control solenoid valve, wiring issues in the IAC circuit, a vacuum leak, or a problem with the engine control module.

3. How can I diagnose the OBDII code P1515 related to the Idle Air Control Solenoid Valve Signal 3 Circuit High Input in my Subaru?

- Diagnosis typically involves checking the wiring and connections in the IAC circuit, testing the IAC solenoid valve for proper operation, and scanning the vehicle's computer for related fault codes.

4. Can a dirty or clogged idle air control valve trigger the OBDII code P1515 in a Subaru?

- Yes, a dirty or clogged idle air control valve can restrict airflow and cause erratic behavior that may trigger the P1515 code.

5. What are some repair tips for addressing OBDII code P1515 in a Subaru?

- Repair tips may include cleaning or replacing the idle air control solenoid valve, repairing any damaged wiring in the circuit, addressing any vacuum leaks, and resetting the fault code.

6. Is it safe to continue driving with the OBDII code P1515 related to the Idle Air Control Solenoid Valve Signal 3 Circuit High Input in my Subaru?

- It is not recommended to continue driving with this code as it can lead to poor engine performance and potential stalling, increasing the risk of safety hazards.

7. How much does it typically cost to repair OBDII code P1515 in a Subaru at a dealership or a repair shop?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can resetting the OBDII code P1515 in a Subaru make it go away temporarily?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear.

9. Are there any preventive measures to avoid encountering the OBDII code P1515 related to the Idle Air Control Solenoid Valve Signal 3 Circuit High Input in my Subaru?

- Regular maintenance, such as cleaning the idle air control valve, checking for vacuum leaks, and ensuring proper wiring connections, can help prevent this code from appearing.

10. Can a DIY enthusiast with automotive knowledge fix the OBDII code P1515 in a Subaru themselves?

- Depending on the level of expertise, DIY enthusiasts may be able to address the P1515 code by following diagnostic procedures, replacing components, and clearing the fault code using an OBDII scanner.

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