AutoCodes – Pontiac – C0251 Pontiac

C0251 Pontiac Code - Electronic Brake Control Module Control Valve Circuit Malfunction

Quick Answer

The Anti-Lock Brake System (ABS) relay supplies battery voltage to six valve solenoids. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (EBCM) 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: C0251 Pontiac indicates Electronic Brake Control Module Control Valve Circuit Malfunction.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (EBCM) 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 986

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 Jun 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0251 Pontiac Description

The Anti-Lock Brake System (ABS) relay supplies battery voltage to six valve solenoids. The Electronic Brake Control Module (EBCM) microprocessor applies the grounds needed to activate each solenoid. The low side of each solenoid coil has a feedback circuit to the EBCM microprocessor. When a solenoid is commanded OFF, the feedback voltage is high. When a solenoid is commanded ON, the feedback voltage is low.

OBDII Code C0251 Pontiac - Electronic Brake Control Module Control Valve Circuit Malfunction - AutoCodes.com — C0251 Pontiac Code - Electronic Brake Control Module Control Valve Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC C0251 Pontiac?

Faulty Electronic Brake Control Module (EBCM)
Electronic Brake Control Module (EBCM) harness is open or shorted
Electronic Brake Control Module (EBCM) circuit poor electrical connection

How to Fix the DTC C0251 Pontiac?

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 C0251 Pontiac 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.

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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 C0251 Pontiac Code

1. What does the OBDII code C0251 mean on a Pontiac?

C0251 indicates a malfunction in the Electronic Brake Control Module (EBCM) related to the control valve circuit, which may affect the vehicle's braking system.

2. What are the common symptoms of code C0251?

Symptoms may include an illuminated ABS or traction control warning light, reduced braking performance, or intermittent ABS operation.

3. What causes the C0251 code on a Pontiac?

Common causes include a faulty Electronic Brake Control Module (EBCM), damaged wiring or connectors in the control valve circuit, or a malfunctioning ABS control valve.

4. Can I still drive my Pontiac with code C0251?

While the vehicle may still be drivable, you could experience reduced braking performance, especially in slippery conditions, as the ABS system may not function properly.

5. How do I diagnose the C0251 code?

Diagnosis involves scanning the ABS system for additional codes, inspecting the wiring and connectors, and testing the EBCM and control valve for functionality.

6. What repairs are needed to fix code C0251?

Repairs may include replacing or repairing damaged wiring, cleaning corroded connectors, or replacing the EBCM or ABS control valve if faulty.

7. How much does it cost to fix the C0251 code on a Pontiac?

Repair costs can vary widely, ranging from $100 to $1,500, depending on whether the issue is with wiring, connectors, or the EBCM itself.

8. Can a weak battery cause the C0251 code?

Yes, a weak or failing battery can cause electrical issues that might trigger this code. Ensure the battery and charging system are in good condition.

9. How can I prevent the C0251 code from reoccurring?

Regular maintenance of the braking system, inspecting wiring for damage, and promptly addressing ABS warnings can help prevent this code.

10. Is it necessary to reprogram the EBCM after replacement?

In some cases, reprogramming or calibration may be required after replacing the EBCM. Consult your vehicleâ€™s service manual or a qualified technician for details.