AutoCodes – Subaru – C0121 Subaru

C0121 Subaru Code - Front Outlet Valve Left

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Front Outlet Solenoid Valve Left. Common causes include Faulty Front Outlet Solenoid Valve Left, Front Outlet Solenoid Valve Left harness is open or shorted, Front Outlet Solenoid Valve Left 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: C0121 Subaru indicates Front Outlet Valve Left.
Common causes: Common causes include Faulty Front Outlet Solenoid Valve Left, Front Outlet Solenoid Valve Left harness is open or shorted, Front Outlet Solenoid Valve Left 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 1,348

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0121 Subaru Description

The Anti-Lock Brake System (ABS) Module monitors the Front Outlet Solenoid Valve Left. The ABS Module sets the OBDII code when the Front Outlet Solenoid Valve Left is not to factory specifications.

OBDII Code C0121 Subaru - Front Outlet Valve Left - AutoCodes.com — C0121 Subaru Code - Front Outlet Valve Left

What does this mean?

What are the Possible Causes of the DTC C0121 Subaru?

Faulty Front Outlet Solenoid Valve Left
Front Outlet Solenoid Valve Left harness is open or shorted
Front Outlet Solenoid Valve Left circuit poor electrical connection

How to Fix the DTC C0121 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 C0121 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 C0121 Subaru code?

Need more information on how to fix the C0121 Subaru code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0121 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 C0121 Subaru Code

1. What are the common symptoms of OBDII code C0121 in a Subaru related to the Front Outlet Valve Left?

The common symptoms include the illumination of the ABS warning light on the dashboard and possible issues with the vehicle's braking system.

2. What are the possible causes of OBDII code C0121 in a Subaru Front Outlet Valve Left?

The code C0121 in a Subaru related to the Front Outlet Valve Left is often triggered by a malfunction in the front outlet valve or a wiring issue in the ABS system.

3. How can I diagnose the OBDII code C0121 in my Subaru Front Outlet Valve Left?

Diagnosing the code C0121 involves using an OBDII scanner to retrieve the specific fault code and then inspecting the front outlet valve and its wiring for any signs of damage or malfunction.

4. Can I continue driving my Subaru with the OBDII code C0121 related to the Front Outlet Valve Left?

It is not recommended to continue driving your Subaru with the OBDII code C0121 present, as it indicates a potential issue with the braking system that could compromise your safety on the road.

5. How can I repair the OBDII code C0121 in my Subaru Front Outlet Valve Left?

Repairing the code C0121 typically involves replacing the faulty front outlet valve or repairing any damaged wiring in the ABS system. It is recommended to consult a professional mechanic for this repair.

6. Are there any DIY tips for fixing the OBDII code C0121 in my Subaru related to the Front Outlet Valve Left?

While it is possible to attempt DIY repairs for the OBDII code C0121, it is recommended to have a professional mechanic handle this issue due to the complexity of the ABS system.

7. Is the OBDII code C0121 in a Subaru related to the Front Outlet Valve Left a common issue?

The OBDII code C0121 related to the Front Outlet Valve Left is not as common as some other OBDII codes, but it can occur in Subarus with ABS system malfunctions.

8. Can weather conditions affect the triggering of the OBDII code C0121 in a Subaru Front Outlet Valve Left?

Extreme weather conditions, such as excessive moisture or extreme temperatures, can sometimes contribute to triggering the OBDII code C0121 in a Subaru related to the Front Outlet Valve Left.

9. How much does it typically cost to repair the OBDII code C0121 in a Subaru Front Outlet Valve Left?

The cost of repairing the OBDII code C0121 in a Subaru can vary depending on the extent of the issue and whether any parts need to be replaced. It is advisable to get a professional assessment for an accurate cost estimate.

10. Are there any recalls or service bulletins related to the OBDII code C0121 in a Subaru Front Outlet Valve Left?

It is advisable to check with Subaru dealerships or online resources to see if there are any recalls or service bulletins related to the OBDII code C0121 in your specific Subaru model.