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Engine-Codes – Subaru – P1517 Subaru

P1517 Subaru Code - Idle Air Control Solenoid Valve Signal 4 Circuit High Input

Quick Answer

The P1517 Subaru code indicates an issue with the Idle Air Control (IAC) solenoid valve signal 4 circuit having a high input. Common causes include Malfunctioning IAC solenoid valve, Damaged wiring or connectors in the circuit, Faulty ECM. 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
P1517 Subaru indicates Idle Air Control Solenoid Valve Signal 4 Circuit High Input.
Common causes
Common causes include Malfunctioning IAC solenoid valve, Damaged wiring or connectors in the circuit, Faulty ECM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P1517 Subaru Description

The P1517 Subaru code indicates an issue with the Idle Air Control (IAC) solenoid valve signal 4 circuit having a high input. The IAC solenoid valve controls the amount of air that bypasses the throttle plate to maintain a stable idle speed. When the engine control module (ECM) detects a high voltage signal from the IAC solenoid valve circuit 4, it triggers this diagnostic trouble code (DTC).

OBDII Code P1517 Subaru - Idle Air Control Solenoid Valve Signal 4 Circuit High Input
P1517 Subaru Code - Idle Air Control Solenoid Valve Signal 4 Circuit High Input

Common Causes of P1517 Subaru

  1. Malfunctioning IAC solenoid valve
  2. Damaged wiring or connectors in the circuit
  3. Faulty ECM
  4. Vacuum leaks
  5. Dirty or clogged IAC valve

Symptoms of P1517 Subaru

  1. Unstable idle speed
  2. Poor acceleration
  3. Rough engine performance
  4. Engine stalling
  5. Difficulty starting the engine

How to Fix P1517 Subaru

  1. Begin by conducting a thorough inspection of the IAC solenoid valve, wiring, and connectors to check for any visible damage or corrosion.
  2. Test the IAC solenoid valve using a multimeter to ensure it is functioning properly. If the valve is faulty, replace it with a new one.
  3. Check for any vacuum leaks in the intake system that could be affecting the IAC valve's operation.
  4. Clear the DTC from the ECM using a diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to pinpoint the exact cause of the high input signal.

Cost to Fix P1517 Subaru

The cost of repairing a P1517 Subaru code can vary depending on the extent of the issue and the specific components that need to be replaced. On average, the repair costs for this issue can range from $150 to $400, including parts and labor. However, it is essential to note that labor rates and diagnostic fees can vary significantly based on the location, vehicle make and model, and the mechanic's expertise. It is advisable to consult with a professional mechanic to get an accurate estimate for the repair.

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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 P1517 Subaru Code

1. What are the common symptoms of OBDII code P1517 in a Subaru related to the Idle Air Control Solenoid Valve Signal 4 Circuit High Input?

- Common symptoms may include erratic idling, stalling at idle, poor acceleration, and possible engine misfires.

2. What are the possible causes of OBDII code P1517 in a Subaru?

- Potential causes can include a faulty idle air control solenoid valve, damaged wiring or connectors, a vacuum leak, or issues with the engine control module (ECM).

3. How can I diagnose the OBDII code P1517 in my Subaru?

- Diagnosis typically involves checking the idle air control solenoid valve's operation, inspecting the wiring and connectors for damage, and using a scan tool to monitor the signal from the valve.

4. Can I continue driving my Subaru with OBDII code P1517 present?

- It is not recommended to drive your Subaru with this code present, as it can lead to poor engine performance and potential damage if left unresolved.

5. How can I repair OBDII code P1517 related to the Idle Air Control Solenoid Valve Signal 4 Circuit High Input in my Subaru?

- Repairing this code may involve replacing the idle air control solenoid valve, repairing any damaged wiring or connectors, fixing vacuum leaks, or reprogramming the ECM if necessary.

6. Are there any DIY tips for troubleshooting OBDII code P1517 in a Subaru?

- DIY tips may include visually inspecting the idle air control solenoid valve and its connections, checking for any obvious wiring issues, and ensuring the vacuum lines are properly connected.

7. How much does it typically cost to repair OBDII code P1517 in a Subaru at a professional auto repair shop?

- Repair costs can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

8. Is it possible for a Subaru owner to reset the OBDII code P1517 at home?

- Yes, you can reset the code at home using an OBDII scanner or by disconnecting the car's battery for a few minutes. However, it is important to address the root cause of the issue to prevent the code from reoccurring.

9. Can a faulty idle air control valve trigger other OBDII codes besides P1517 in a Subaru?

- Yes, a faulty idle air control valve can potentially trigger other related codes, such as P1518 (Idle Air Control Solenoid Valve Signal 5 Circuit Low Input) or P1519 (Idle Air Control Solenoid Valve Signal 5 Circuit High Input).

10. How long does it typically take to repair OBDII code P1517 related to the Idle Air Control Solenoid Valve Signal 4 Circuit High Input in a Subaru?

- The repair time can vary depending on the exact cause and complexity of the issue, but it may take anywhere from 1 to 3 hours at a professional auto repair shop.

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