OBD Guide
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C1425

Open In Stop Light Switch Circuit

C1425 is an OBD-II diagnostic trouble code meaning: Open In Stop Light Switch Circuit. Common causes: broken or damaged wires in the brake light switch circuit, brake light switch malfunction. Estimated repair cost: $22–56.

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

Symptoms

  • Brake lights don't work
  • Cruise control does not disengage when you press the brakes
  • Check Engine light comes on
  • Problems with the ABS system

Causes

  • Broken or damaged wires in the brake light switch circuit
  • Brake light switch malfunction
  • Poor contact in connectors
  • Short circuit in the circuit

How to Fix

  1. Check the integrity of the wires in the brake light switch circuit
  2. Check the operation of the brake light switch
  3. Clean or replace connectors if poor contacts are found
  4. Replace the brake light switch if it is faulty
  5. Reset the error code and check if it returns

Related codes

C1426C1427P0571

FAQ

What does the C1425 code mean?

C1425 is an OBD-II diagnostic trouble code that indicates: Open In Stop Light Switch Circuit

What causes a C1425 error code?

The most common causes of C1425 include: Broken or damaged wires in the brake light switch circuit; Brake light switch malfunction; Poor contact in connectors; Short circuit in the circuit.

How do I fix a C1425 diagnostic trouble code?

To fix C1425: Check the integrity of the wires in the brake light switch circuit. Check the operation of the brake light switch. Clean or replace connectors if poor contacts are found. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1425?

Limited driving only, diagnose soon

How much does it cost to fix C1425?

The estimated repair cost for C1425 is $22–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat