AutoCodes – Subaru – C0051 Subaru

C0051 Subaru Code - Valve Relay

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Valve Relay. Common causes include Faulty Valve Relay, Valve Relay harness is open or shorted, Valve Relay 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: C0051 Subaru indicates Valve Relay.
Common causes: Common causes include Faulty Valve Relay, Valve Relay harness is open or shorted, Valve Relay 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 9,783

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 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0051 Subaru Description

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

OBDII Code C0051 Subaru - Valve Relay - AutoCodes.com — C0051 Subaru Code - Valve Relay

What does this mean?

What are the Possible Causes of the DTC C0051 Subaru?

Faulty Valve Relay
Valve Relay harness is open or shorted
Valve Relay circuit poor electrical connection

How to Fix the DTC C0051 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 C0051 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 C0051 Subaru 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 C0051 Subaru Code

1. What are the common symptoms of OBDII code C0051 in a Subaru related to the Valve Relay?

- The common symptoms include rough idling, engine stalling, and a decrease in overall engine performance.

2. What could cause OBDII code C0051, Valve Relay, to appear in a Subaru?

- The code can be triggered by a faulty valve relay, wiring issues, or a malfunction in the valve relay circuit.

3. How can I diagnose the cause of OBDII code C0051 in my Subaru?

- It is recommended to perform a thorough inspection of the valve relay, check the wiring for any damage, and use a diagnostic scanner to pinpoint the exact issue.

4. Can I continue driving my Subaru with OBDII code C0051 present?

- It is not advisable to continue driving with this code as it can lead to more serious engine problems and potential breakdowns.

5. What are some repair tips for fixing OBDII code C0051 related to the Valve Relay in a Subaru?

- Start by inspecting and potentially replacing the valve relay, checking and repairing any damaged wiring, and clearing the code with a diagnostic scanner after the repairs.

6. How much does it typically cost to repair OBDII code C0051 in a Subaru?

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

7. Can OBDII code C0051 in a Subaru be fixed at home, or should I take it to a mechanic?

- If you have experience with automotive repairs and the necessary tools, you may be able to fix the issue at home. However, it is recommended to consult a mechanic for a proper diagnosis and repair.

8. Are there any preventive measures to avoid OBDII code C0051 from appearing in my Subaru?

- Regular maintenance, such as checking the condition of the valve relay and wiring, can help prevent this code from appearing unexpectedly.

9. Will resetting the OBDII system clear the C0051 code in my Subaru temporarily?

- Resetting the system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

10. Is OBDII code C0051 related to the Valve Relay a common problem in Subarus?

- While not extremely common, issues with the valve relay triggering this code can occur in Subarus, especially in older models or those with high mileage.