Engine-Codes.com
Engine-Codes – Subaru – P1512 Subaru

P1512 Subaru Code - Idle Air Control Solenoid Valve Signal 2 Circuit Low Input

Quick Answer

The P1512 code for Subaru vehicles refers to an issue with the Idle Air Control (IAC) Solenoid Valve Signal 2 Circuit having a low input. Common causes include Faulty Idle Air Control Solenoid Valve: The valve may be sticking or failing to operate correctly, Damaged wiring or connectors: Corrosion, fraying, or loose connections in the circuit can disrupt the signal, Malfunctioning Engine Control Module (ECM): The ECM may not be sending the proper signals to the Idle Air Control Solenoid Valve. 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
P1512 Subaru indicates Idle Air Control Solenoid Valve Signal 2 Circuit Low Input.
Common causes
Common causes include Faulty Idle Air Control Solenoid Valve: The valve may be sticking or failing to operate correctly, Damaged wiring or connectors: Corrosion, fraying, or loose connections in the circuit can disrupt the signal, Malfunctioning Engine Control Module (ECM): The ECM may not be sending the proper signals to the Idle Air Control Solenoid Valve.
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 09, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P1512 Subaru Description

The P1512 code for Subaru vehicles refers to an issue with the Idle Air Control (IAC) Solenoid Valve Signal 2 Circuit having a low input. The Idle Air Control Solenoid Valve is responsible for regulating the amount of air that enters the engine while the vehicle is idling. This valve helps maintain a steady and consistent idle speed, ensuring smooth operation and optimal performance of the engine.

OBDII Code P1512 Subaru - Idle Air Control Solenoid Valve Signal 2 Circuit Low Input
P1512 Subaru Code - Idle Air Control Solenoid Valve Signal 2 Circuit Low Input

Common Causes of P1512 Subaru

  1. Faulty Idle Air Control Solenoid Valve: The valve may be sticking or failing to operate correctly.
  2. Damaged wiring or connectors: Corrosion, fraying, or loose connections in the circuit can disrupt the signal.
  3. Malfunctioning Engine Control Module (ECM): The ECM may not be sending the proper signals to the Idle Air Control Solenoid Valve.
  4. Vacuum leak: A leak in the vacuum system can affect the air intake, causing issues with the idle air control.

Symptoms of P1512 Subaru

  1. Irregular idle speed: The engine may idle erratically, fluctuating between high and low RPMs.
  2. Rough idling: The vehicle may shake or vibrate excessively while idling.
  3. Stalling: The engine may stall unexpectedly, especially when coming to a stop.
  4. Poor engine performance: The vehicle may lack power, have reduced acceleration, or experience hesitation during driving.

How to Fix P1512 Subaru

  1. Diagnose the issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the idle air control system.
  2. Test the Idle Air Control Solenoid Valve: Check the valve for proper operation and replace it if necessary.
  3. Inspect wiring and connectors: Look for any damage or corrosion in the wiring and connectors, repairing or replacing as needed.
  4. Check the Engine Control Module: Ensure that the ECM is functioning correctly and reprogram or replace it if necessary.
  5. Address any vacuum leaks: Locate and repair any leaks in the vacuum system to restore proper air intake.

Cost to Fix P1512 Subaru

The typical repair costs for addressing a P1512 code related to the Idle Air Control Solenoid Valve Signal 2 Circuit Low Input can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair for this problem can range from $200 to $500, including parts and labor. It's important to note that diagnosis time and labor rates can vary, so it's advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your vehicle's make and model.

Need more information about the P1512 Subaru code?

Need more information on how to fix the P1512 Subaru code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1512 Subaru code diagnosed by a professional: Find a repair shop in your area

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 P1512 Subaru Code

1. What are common symptoms of OBDII code P1512 in a Subaru related to the Idle Air Control Solenoid Valve Signal 2 Circuit Low Input?

- Common symptoms include rough idle, stalling at low speeds, and difficulty maintaining a steady idle speed.

2. What are the possible causes of OBDII code P1512 in a Subaru?

- The code P1512 in a Subaru is often caused by a faulty idle air control solenoid valve, wiring issues, or a malfunctioning engine control module (ECM).

3. How can I diagnose the cause of OBDII code P1512 in my Subaru?

- To diagnose the issue, you can perform a visual inspection of the wiring and connectors, test the resistance of the solenoid valve, and use a scan tool to monitor the sensor data related to the idle air control system.

4. Can a dirty throttle body cause OBDII code P1512 in a Subaru?

- Yes, a dirty throttle body can disrupt the airflow and affect the idle air control system, potentially triggering the P1512 code in a Subaru.

5. How should I repair OBDII code P1512 in my Subaru?

- Depending on the root cause, you may need to replace the idle air control solenoid valve, repair or replace damaged wiring, or reprogram the ECM to resolve the P1512 code.

6. Is it safe to continue driving with OBDII code P1512 present in my Subaru?

- It is not recommended to continue driving with the P1512 code as it can lead to poor engine performance, stalling, and potential damage to other engine components.

7. Can a DIY enthusiast fix OBDII code P1512 in a Subaru?

- While some repairs related to the P1512 code can be done by a DIY enthusiast, it is recommended to have a professional mechanic diagnose and repair the issue to ensure proper resolution.

8. Will resetting the OBDII code P1512 in my Subaru make it go away permanently?

- Simply resetting the code without addressing the underlying issue will not make it go away permanently. The root cause must be diagnosed and repaired to prevent code recurrence.

9. How long does it typically take to repair OBDII code P1512 in a Subaru?

- The repair time for the P1512 code can vary depending on the cause and complexity of the issue. It may take anywhere from a few hours to a full day to complete the repair.

10. Can the OBDII code P1512 in a Subaru be a recurring problem?

- If the root cause of the P1512 code is not properly addressed, it can become a recurring problem, leading to ongoing issues with the idle air control system.

Discuss the causes and fixes for P1512 Subaru OBDII Code

Submit a New Comment

Code P1512 Subaru comments

No comments found for this page.