OBD Guide
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B263A

Exterior Illumination Lamp Circuit

B263A is an OBD-II diagnostic trouble code meaning: Exterior Illumination Lamp Circuit. Common causes: blown fuse, broken or damaged wiring harness. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–56 (est.)

Symptoms

  • Headlights, side lights or turn signals do not work
  • Flashing or unstable outdoor lighting
  • Dashboard warning for lighting fault

Causes

  • Blown fuse
  • Broken or damaged wiring harness
  • Faulty lighting relay
  • Problems with the lighting control module
  • Oxidized contacts in connectors
  • Faulty lamps or LED modules

How to Fix

  1. Check and replace blown fuses
  2. Inspect the wiring harness for damage
  3. Check the operation of the lighting relay
  4. Test the lighting control module
  5. Clean and treat contacts in connectors
  6. Replace faulty lamps or LED modules

Related codes

B263BB263CB2635

FAQ

What does the B263A code mean?

B263A is an OBD-II diagnostic trouble code that indicates: Exterior Illumination Lamp Circuit

What causes a B263A error code?

The most common causes of B263A include: Blown fuse; Broken or damaged wiring harness; Faulty lighting relay; Problems with the lighting control module.

How do I fix a B263A diagnostic trouble code?

To fix B263A: Check and replace blown fuses. Inspect the wiring harness for damage. Check the operation of the lighting relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B263A?

Do not drive — repair immediately

How much does it cost to fix B263A?

The estimated repair cost for B263A is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat