OBD Guide

C1782

Stop Light Switch Circuit

C1782 is an OBD-II diagnostic trouble code meaning: Stop Light Switch Circuit. Common causes: faulty brake light switch, open or short circuit in the circuit. Estimated repair cost: $6–33.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • Brake lights do not turn on when you press the brake pedal
  • The malfunction indicator on the dashboard is on
  • Incorrect operation of cruise control

Causes

  • Faulty brake light switch
  • Open or short circuit in the circuit
  • Poor contact in connectors
  • Fuse problems

How to Fix

  1. Check the fuse associated with the brake light circuit
  2. Inspect the wiring for damage
  3. Check the operation of the brake light switch
  4. Replace the faulty switch or repair the wiring

Related codes

FAQ

What does the C1782 code mean?

C1782 is an OBD-II diagnostic trouble code that indicates: Stop Light Switch Circuit

What causes a C1782 error code?

The most common causes of C1782 include: Faulty brake light switch; Open or short circuit in the circuit; Poor contact in connectors; Fuse problems.

How do I fix a C1782 diagnostic trouble code?

To fix C1782: Check the fuse associated with the brake light circuit. Inspect the wiring for damage. Check the operation of the brake light switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1782?

Limited driving only, diagnose soon

How much does it cost to fix C1782?

The estimated repair cost for C1782 is $6–33. Actual cost depends on your vehicle, location, and labor rates.

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