OBD Guide
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C1247

Brake Fluid Level Switch Grounded

C1247 is an OBD-II diagnostic trouble code meaning: Brake Fluid Level Switch Grounded. Common causes: short circuit in sensor wiring, malfunction of the brake fluid level sensor itself. Estimated repair cost: $11–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • The brake system fault indicator is on
  • False low brake fluid warning
  • Reduced ABS/ESP performance

Causes

  • Short circuit in sensor wiring
  • Malfunction of the brake fluid level sensor itself
  • Damaged wiring harness
  • Sensor contact corrosion

How to Fix

  1. Check the brake fluid level
  2. Inspect the wiring and connectors of the sensor for damage
  3. Check sensor resistance (must meet manufacturer specifications)
  4. Replace the brake fluid level sensor if it is faulty
  5. Clean or replace damaged wires

Related codes

C1246C1248C1250

FAQ

What does the C1247 code mean?

C1247 is an OBD-II diagnostic trouble code that indicates: Brake Fluid Level Switch Grounded

What causes a C1247 error code?

The most common causes of C1247 include: Short circuit in sensor wiring; Malfunction of the brake fluid level sensor itself; Damaged wiring harness; Sensor contact corrosion.

How do I fix a C1247 diagnostic trouble code?

To fix C1247: Check the brake fluid level. Inspect the wiring and connectors of the sensor for damage. Check sensor resistance (must meet manufacturer specifications). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1247?

Limited driving only, diagnose soon

How much does it cost to fix C1247?

The estimated repair cost for C1247 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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