AutoCodes – Generic – B263A:02

B263A:02 Code - Exterior Illumination Lamp Circuit Short to Ground

Quick Answer

The Body Control Module (BCM) supplies battery voltage to each exterior door handle LED backlighting, the LED lighting located under each outside rearview mirror for approach lighting, and both running board steps courtesy lamps when equipped. Common causes include Faulty Exterior Illumination Lamp, Exterior Illumination Lamp harness is open or shorted, Exterior Illumination Lamp circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B263A:02 indicates Exterior Illumination Lamp Circuit Short to Ground.
Common causes: Common causes include Faulty Exterior Illumination Lamp, Exterior Illumination Lamp harness is open or shorted, Exterior Illumination Lamp circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 302

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 29, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B263A:02 Description

The Body Control Module (BCM) supplies battery voltage to each exterior door handle LED backlighting, the LED lighting located under each outside rearview mirror for approach lighting, and both running board steps courtesy lamps when equipped. When the keyless entry transmitter is operated to the lock/unlock functions the LED lighting located under each outside rearview mirror, exterior door handles, and both running board steps are commanded ON for approach lighting. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a short to ground in the exterior courtesy lamps control circuit.

OBDII Code B263A:02 - Exterior Illumination Lamp Circuit Short to Ground - AutoCodes.com — B263A:02 Code - Exterior Illumination Lamp Circuit Short to Ground

What does this mean?

What are the Possible Causes of the DTC B263A:02?

Faulty Exterior Illumination Lamp
Exterior Illumination Lamp harness is open or shorted
Exterior Illumination Lamp circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B263A:02?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

B263A:02 Exterior Illumination Lamp Circuit Short to Ground
B263A:04 Exterior Illumination Lamp Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B263A:02 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B263A:02 Code

What does OBDII code B263A:02 mean?

Code B263A:02 indicates a short to ground in the circuit responsible for the exterior illumination lamps, which may cause the lights to malfunction.

What are the common symptoms of the B263A:02 code?

Common symptoms include non-functional exterior lights, flickering lights, or dashboard warning lights related to the lighting system.

What typically causes a B263A:02 code to appear?

This code is often caused by damaged wiring, corroded connectors, or a shorted lamp assembly in the exterior lighting circuit.

Can I still drive my car with a B263A:02 code?

While the car may still be drivable, the malfunctioning exterior lights could pose safety risks, especially at night or in poor visibility conditions.

How do I diagnose the B263A:02 code?

Start by visually inspecting the exterior lighting wiring and connectors for damage or corrosion, then test the circuit for continuity to identify a short to ground.

What tools are needed to fix a B263A:02 code?

Common tools include a multimeter for testing the circuit, basic hand tools for removing components, and possibly a wiring diagram for the specific vehicle.

How can I fix the B263A:02 code?

Repairs may involve replacing damaged wiring, cleaning corroded connectors, or replacing a faulty lamp assembly that is causing the short.

Is it expensive to repair a B263A:02 code?

The cost varies depending on the root cause. Minor repairs like fixing wiring or cleaning connectors are inexpensive, but replacing components like lamp assemblies may cost more.

Can I clear the B263A:02 code without fixing the problem?

You can temporarily clear the code with an OBDII scanner, but it will likely return unless the underlying issue is resolved.

Does the B263A:02 code affect other vehicle systems?

Typically, this code only affects the exterior illumination system, but prolonged electrical shorts could potentially impact related circuits over time.