AutoCodes – Generic – C1247

C1247 Code - Brake Fluid Level Switch Grounded

Quick Answer

The brake fluid level switch monitors the level of brake fluid in the master cylinder. Common causes include Faulty Brake Fluid Level Switch, Brake Fluid Level Switch harness is open or shorted, Brake Fluid Level Switch 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: C1247 indicates Brake Fluid Level Switch Grounded.
Common causes: Common causes include Faulty Brake Fluid Level Switch, Brake Fluid Level Switch harness is open or shorted, Brake Fluid Level Switch 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 20,694

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 Aug 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1247 Description

The brake fluid level switch monitors the level of brake fluid in the master cylinder. When the Electronic Brake Control Module (EBCM) sees the brake fluid level switch input grounded, it sends a serial data message to the Instrument Panel Cluster (IPC) that tells the IPC that the brake fluid level is low. The IPC then turns ON the Red Brake indicator.

OBDII Code C1247 - Brake Fluid Level Switch Grounded - AutoCodes.com — C1247 Code - Brake Fluid Level Switch Grounded

What does this mean?

What are the Possible Causes of the DTC C1247?

Faulty Brake Fluid Level Switch
Brake Fluid Level Switch harness is open or shorted
Brake Fluid Level Switch circuit poor electrical connection

How to Fix the DTC C1247?

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 C1247 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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Information for Specific Makes

C1247 Buick — Brake Fluid Level Switch Grounded
C1247 Cadillac — Brake Fluid Level Switch Grounded
C1247 Chevrolet — Brake Fluid Level Switch Grounded
C1247 GMC — Brake Fluid Level Switch Grounded
C1247 Lexus — Malfunction In Stroke Sensor
C1247 Nissan — Malfunction In Stroke Sensor
C1247 Pontiac — Brake Fluid Level Switch Grounded
C1247 Saturn — Brake Fluid Level Switch Grounded
C1247 Scion — Malfunction In Stroke Sensor
C1247 Toyota — Malfunction In Stroke Sensor

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 C1247 Code

1. What does OBDII code C1247 mean?

C1247 indicates that the brake fluid level switch is grounded, often due to a low brake fluid level or an electrical issue in the brake fluid level sensor circuit.

2. What are the common symptoms of code C1247?

Common symptoms include the brake warning light illuminating on the dashboard and, in some cases, reduced braking performance.

3. What causes the C1247 code to appear?

The primary causes include low brake fluid, a faulty brake fluid level sensor, damaged wiring, or a poor ground connection within the sensor circuit.

4. Can driving with code C1247 be dangerous?

Yes, it can be dangerous because the code may indicate low brake fluid, which could compromise braking performance and increase the risk of an accident.

5. How do I diagnose the C1247 code?

Start by checking the brake fluid level and inspect the brake fluid level sensor, wiring, and connectors for damage or corrosion. Use a multimeter to test the sensor's ground connection if necessary.

6. How can I fix the C1247 code?

Refill the brake fluid to the proper level if it's low. If the issue persists, repair or replace damaged wiring, connectors, or the brake fluid level sensor itself.

7. Can low brake fluid trigger the C1247 code?

Yes, low brake fluid is one of the most common reasons for this code, as it can cause the brake fluid level switch to remain grounded.

8. How much does it cost to repair code C1247?

The cost depends on the exact issue. Refilling brake fluid costs around $10-$30, while replacing a brake fluid level sensor can cost $100-$200, including labor.

9. Will clearing the C1247 code fix the problem?

Clearing the code will only temporarily remove it. The underlying issue, such as low brake fluid or a faulty sensor, must be resolved to prevent the code from returning.

10. Can a faulty brake fluid level sensor cause other issues?

Yes, a faulty sensor may cause the brake warning light to stay on, making it harder to identify other potential braking system issues.