OBD Guide
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C1249

Open in Stop Light Switch Circuit

C1249 is an OBD-II diagnostic trouble code meaning: Open in Stop Light Switch Circuit. Common causes: broken wires in the harness, brake light switch malfunction. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Brake lights do not turn on when the pedal is pressed
  • The car does not exit the parking mode (automatic transmission)
  • Check Engine Light Is On
  • Errors in ABS/ESP systems

Causes

  • Broken wires in the harness
  • Brake light switch malfunction
  • Oxidized contacts
  • Fuse problems
  • Control unit defective

How to Fix

  1. Circuit fuse check
  2. Diagnostics of the brake light switch condition
  3. Testing circuits with a multimeter
  4. Cleaning contacts
  5. Replacing the switch if necessary
  6. Resetting an error using an OBD-II scanner

Related codes

C1250C1251U0121

FAQ

What does the C1249 code mean?

C1249 is an OBD-II diagnostic trouble code that indicates: Open in Stop Light Switch Circuit

What causes a C1249 error code?

The most common causes of C1249 include: Broken wires in the harness; Brake light switch malfunction; Oxidized contacts; Fuse problems.

How do I fix a C1249 diagnostic trouble code?

To fix C1249: Circuit fuse check. Diagnostics of the brake light switch condition. Testing circuits with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1249?

Limited driving only, diagnose soon

How much does it cost to fix C1249?

The estimated repair cost for C1249 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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