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Engine-Codes – Subaru – C0120 Subaru

C0120 Subaru Code - Front Inlet Valve Left

Quick Answer

The C0120 code for Subaru vehicles specifically refers to an issue with the Front Inlet Valve on the left side of the vehicle. Common causes include Wear and tear on the Front Inlet Valve, Corrosion or rust affecting the valve's functionality, Internal blockages within the 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
C0120 Subaru indicates Front Inlet Valve Left.
Common causes
Common causes include Wear and tear on the Front Inlet Valve, Corrosion or rust affecting the valve's functionality, Internal blockages within the 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 17, 2024
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Code C0120 Subaru Description

The C0120 code for Subaru vehicles specifically refers to an issue with the Front Inlet Valve on the left side of the vehicle. The Front Inlet Valve is a crucial component of the braking system, responsible for regulating the flow of brake fluid to the front left brake caliper. When this valve malfunctions or fails, it can have serious implications for the vehicle's braking performance and overall safety.

OBDII Code C0120 Subaru - Front Inlet Valve Left
C0120 Subaru Code - Front Inlet Valve Left

Common Causes of C0120 Subaru

  1. Wear and tear on the Front Inlet Valve
  2. Corrosion or rust affecting the valve's functionality
  3. Internal blockages within the valve
  4. Electrical issues in the valve's control circuit
  5. Faulty wiring connections related to the valve

Symptoms of C0120 Subaru

  1. Vehicle pulling to one side during braking
  2. Increased stopping distances
  3. Brake pedal feels spongy or soft
  4. Illumination of the ABS warning light on the dashboard
  5. Uneven wear on the front brake pads

How to Fix C0120 Subaru

  1. Begin by conducting a thorough inspection of the Front Inlet Valve and its surrounding components.
  2. Test the valve's functionality using a diagnostic tool to pinpoint the exact cause of the issue.
  3. Replace the Front Inlet Valve if it is found to be faulty, ensuring the new valve is compatible with the vehicle's make and model.
  4. Clear the diagnostic trouble code from the vehicle's system using the diagnostic tool.
  5. Conduct a road test to verify that the braking system is functioning correctly and that the issue has been resolved.

Cost to Fix C0120 Subaru

The typical repair costs for addressing a Front Inlet Valve Left issue on a Subaru vehicle can range from $200 to $500, including parts and labor. However, it is essential to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It is advisable to obtain local quotes for a more accurate estimate of the repair costs.

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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 C0120 Subaru Code

1. What are the common symptoms of OBDII code C0120 in a Subaru related to the Front Inlet Valve Left?

The common symptoms include uneven braking, reduced braking performance, and potential illumination of the ABS warning light.

2. What are the possible causes of OBDII code C0120 related to the Front Inlet Valve Left in a Subaru?

Possible causes include a faulty front inlet valve left, damaged wiring or connectors, or issues with the ABS control module.

3. How can I diagnose the Front Inlet Valve Left issue causing OBDII code C0120 in my Subaru?

Diagnosis typically involves using a professional OBDII scanner to read and interpret the code, along with conducting a visual inspection of the ABS components and wiring for any visible damage.

4. What are some recommended repair tips for fixing OBDII code C0120 in a Subaru related to the Front Inlet Valve Left?

Repair tips may include checking and repairing any damaged wiring or connectors, testing and potentially replacing the front inlet valve left, and ensuring proper connection to the ABS control module.

5. Can I drive my Subaru with OBDII code C0120 related to the Front Inlet Valve Left without immediate repair?

It is not recommended to drive the vehicle with this issue as it may affect the braking system's performance and safety. It is advised to address the problem promptly.

6. Is it possible to clear the OBDII code C0120 related to the Front Inlet Valve Left in a Subaru without fixing the underlying issue?

Clearing the code without addressing the root cause may temporarily turn off the warning light, but the issue will likely reoccur, affecting the vehicle's braking system.

7. How much does it typically cost to repair OBDII code C0120 in a Subaru related to the Front Inlet Valve Left?

The cost of repair can vary depending on the specific issue, parts needed, and labor rates, but it is recommended to consult a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast with automotive knowledge fix OBDII code C0120 in a Subaru related to the Front Inlet Valve Left?

While some basic troubleshooting and repairs may be possible for DIY enthusiasts, diagnosing and repairing ABS system issues like this code may require specialized tools and expertise best handled by a professional.

9. Are there any recalls or technical service bulletins related to OBDII code C0120 in Subaru vehicles?

It is recommended to check with Subaru dealerships or online resources for any recalls or technical service bulletins related to OBDII code C0120 and the Front Inlet Valve Left issue.

10. How can I prevent OBDII code C0120 related to the Front Inlet Valve Left from occurring in my Subaru in the future?

Regular maintenance, such as inspecting and servicing the ABS system components, checking for any signs of wear or damage, and addressing any issues promptly, can help prevent this code from occurring.

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