OBD Guide
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C1006

Brake Fluid Level Input Circuit Short To Battery Or Open

C1006 is an OBD-II diagnostic trouble code meaning: Brake Fluid Level Input Circuit Short To Battery Or Open. Common causes: open or short circuit in wiring harness, oxidation of sensor contacts. Estimated repair cost: $22–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–56 (est.)

Symptoms

  • Low brake fluid level light is on
  • False sensor alarms
  • Lack of response to changes in fluid level

Causes

  • Open or short circuit in wiring harness
  • Oxidation of sensor contacts
  • Malfunction of the brake fluid level sensor
  • Problems with the control module

How to Fix

  1. Check the brake fluid level
  2. Inspect the wiring harness for damage
  3. Check sensor contacts for oxidation
  4. Test the sensor with a multimeter
  5. Replace sensor if necessary
  6. Check the circuit to the control module

Related codes

C1005C1007

FAQ

What does the C1006 code mean?

C1006 is an OBD-II diagnostic trouble code that indicates: Brake Fluid Level Input Circuit Short To Battery Or Open

What causes a C1006 error code?

The most common causes of C1006 include: Open or short circuit in wiring harness; Oxidation of sensor contacts; Malfunction of the brake fluid level sensor; Problems with the control module.

How do I fix a C1006 diagnostic trouble code?

To fix C1006: Check the brake fluid level. Inspect the wiring harness for damage. Check sensor contacts for oxidation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1006?

Limited driving only, diagnose soon

How much does it cost to fix C1006?

The estimated repair cost for C1006 is $22–56. Actual cost depends on your vehicle, location, and labor rates.

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